Answer :
To determine which proportion is false, let's analyze each pair of fractions:
1. First Pair: [tex]\(\frac{20}{50} = \frac{40}{100}\)[/tex]
- Simplifying both sides:
- [tex]\(\frac{20}{50} = \frac{2}{5}\)[/tex]
- [tex]\(\frac{40}{100} = \frac{4}{10} = \frac{2}{5}\)[/tex]
- Since both fractions simplify to [tex]\(\frac{2}{5}\)[/tex], this proportion is true.
2. Second Pair: [tex]\(\frac{25}{45} = \frac{50}{90}\)[/tex]
- Simplifying both sides:
- [tex]\(\frac{25}{45} = \frac{5}{9}\)[/tex]
- [tex]\(\frac{50}{90} = \frac{5}{9}\)[/tex]
- Since both fractions simplify to [tex]\(\frac{5}{9}\)[/tex], this proportion is true.
3. Third Pair: [tex]\(\frac{18}{48} = \frac{30}{50}\)[/tex]
- Simplifying both sides:
- [tex]\(\frac{18}{48} = \frac{3}{8}\)[/tex]
- [tex]\(\frac{30}{50} = \frac{3}{5}\)[/tex]
- Since the fractions [tex]\(\frac{3}{8}\)[/tex] and [tex]\(\frac{3}{5}\)[/tex] are not equal, this proportion is false.
4. Fourth Pair: [tex]\(\frac{12}{15} = \frac{20}{25}\)[/tex]
- Simplifying both sides:
- [tex]\(\frac{12}{15} = \frac{4}{5}\)[/tex]
- [tex]\(\frac{20}{25} = \frac{4}{5}\)[/tex]
- Since both fractions simplify to [tex]\(\frac{4}{5}\)[/tex], this proportion is true.
Therefore, the false proportion is [tex]\(\frac{18}{48} = \frac{30}{50}\)[/tex].
1. First Pair: [tex]\(\frac{20}{50} = \frac{40}{100}\)[/tex]
- Simplifying both sides:
- [tex]\(\frac{20}{50} = \frac{2}{5}\)[/tex]
- [tex]\(\frac{40}{100} = \frac{4}{10} = \frac{2}{5}\)[/tex]
- Since both fractions simplify to [tex]\(\frac{2}{5}\)[/tex], this proportion is true.
2. Second Pair: [tex]\(\frac{25}{45} = \frac{50}{90}\)[/tex]
- Simplifying both sides:
- [tex]\(\frac{25}{45} = \frac{5}{9}\)[/tex]
- [tex]\(\frac{50}{90} = \frac{5}{9}\)[/tex]
- Since both fractions simplify to [tex]\(\frac{5}{9}\)[/tex], this proportion is true.
3. Third Pair: [tex]\(\frac{18}{48} = \frac{30}{50}\)[/tex]
- Simplifying both sides:
- [tex]\(\frac{18}{48} = \frac{3}{8}\)[/tex]
- [tex]\(\frac{30}{50} = \frac{3}{5}\)[/tex]
- Since the fractions [tex]\(\frac{3}{8}\)[/tex] and [tex]\(\frac{3}{5}\)[/tex] are not equal, this proportion is false.
4. Fourth Pair: [tex]\(\frac{12}{15} = \frac{20}{25}\)[/tex]
- Simplifying both sides:
- [tex]\(\frac{12}{15} = \frac{4}{5}\)[/tex]
- [tex]\(\frac{20}{25} = \frac{4}{5}\)[/tex]
- Since both fractions simplify to [tex]\(\frac{4}{5}\)[/tex], this proportion is true.
Therefore, the false proportion is [tex]\(\frac{18}{48} = \frac{30}{50}\)[/tex].
