Answer :
Proportionality is the ratio between two directly proportional quantities. These proportionality constant generally goes on increasing and decreasing at the same rate. The constant of proportionality k is given by k=y/x.
In general , for calculating the proportionality factor the corresponding side in the original figure and the enlarged figure have lengths of 4 cm and 48 cm, respectively. Thus, we have: k = Y/X = 48/4 = 12
Now we can use this proportionality factor to find the enlarged figure:
The side that originally measured 3 cm will : 3 cm x 12 = 36 cm
The side that originally measured 8 cm will : 8 cm x 12 = 96 cm
The side that originally measured 11 cm will : 11 cm x 12 = 132 cm
Therefore, the measures of the sides of the enlarged figure are: 48 cm, 36 cm, 96 cm, and 132 cm.
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