Question

Check whether the following numbers are in proportion or not
a) 8, 20, 6 and 15
b) 9, 12 and 16
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Answer 1

Answer:

a) 8:20::6:15

8×15=120

20×6=120

The product of means is equal to the product of extremes

So, the 8,20,6 and 15 are in proportion

b) 9:12::12:16

9×16=144

12×12=144

The product of means is equal to the product of extremes

So, the 9, 12 and 16 are in proportion

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