Question

if 20,25,15 and x are in proportion ...find the value of x. with explanation

Answer 1

if 20:25:: 15 : x then the answer come in decimal 18.75

Answer 2

The value of x is 18.75

Solution:

Given that,

20,25,15 and x are in proportion

Which means,

20 : 25 : : 15 : x

We have to find the value of "x"

We know that,

a : b : : c : d

This can be written as,

$\frac{a}{b} = \frac{c}{d}$

Therefore,

$\frac{20}{25} = \frac{15}{x}\\\\Solve\ for\ x\\\\x = 15 \times \frac{25}{20}\\\\x = 18.75$

Thus value of x is 18.75

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