Question

9,11,20,21 - Check if the given numbers are in proportion or not?

Answer 1

Hello !


Here is your answer !



the given digits will be in proportion if the product of the mean is equal to the product of the extreme


Product of means = 11 × 20 = 220

Product of extremes = 21 × 9 = 189


Not equal So the given no are not in proportion

Hope it helps

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 = 9 , b = 11 , c = 20 , d = 21

Now ,

a × d = 9 × 21 = 181

b × c = 11 × 20 = 220

Therefore ,

ad ≠ bc

So, 9 , 11 , 20 , 21 are not in proportion.

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