Question

. If 10, 20, x and 40 are in a proportion, the value of x will be

Answer 1

10/20 equal to x/40
10×40equal to 20×x
400/20 equal to x
x equal to 20 Ans.

Answer 2

Answer:

$The \: value \: of \: x = 20$

Step-by-step explanation:

/* If a,b,c and d are in proportion then

bc = ad */

Here ,

10, 20, x and 40 are in proportion

$10 : 20 = x : 40$

$\implies 20 \times x = 10 \times 40$

$\implies x = \frac{10 \times 40 }{20}$

$\implies x = 10 \times 2$

$\implies x = 20$

Therefore,

$The \: value \: of \: x = 20$

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