30 is the mean proportional of 18 and A. Find the value of A.

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Accepted Answer

The mean proportional between two numbers x and y is given by the square root of their product, i.e., mean proportional = √(x * y).

Here, the mean proportional is 30, and one number is 18. Let the other number be A.

So, 30 = √(18 * A)
=> 30^2 = 18 * A
=> 900 = 18 * A
=> A = 900 / 18 = 50

Therefore, the value of A is 50.

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