Question

3,7,9,21 - Check if the given numbers are in proportion or not?

Answer 1

Hello !


Here is your answer !

Product of means = 9 × 7 = 63


Product of means = 21 × 3 = 63


Both equal so it is in proportion

Answer 2

Solution :

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We know that ,

If a × d = b × c then

a , b , c , d are in proportion.

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Here ,

a = 3 , b = 7 , c = 9 , d = 21

Now ,

a × d = 3 × 21 = 63

b × c = 7 × 9 = 63

Therefore ,

ad = bc ,

Given Numbers are in proportion.

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