Question

Determine the value of K if 20:k::25:450?

Answer 1

Since they are in proportion, the ratio of first two numbers is equal to the ratio of other two numbers

=> 20 : k = 25 : 450

=> 20/ k = 25 / 450

=> 20 / k = 1 / 18

On cross multiplying, we get

=> k = 20 × 18

=> k = 360

Answer 2

20/k = 25/450
20×450 = 25×k
20×450/25 = k
360 = k

Therefore,
Value of k is 360

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