Question

If 3:13::x:39, then find x

Answer 1

Answer:

we know that,

a:b::c:d

a*d = b*c

so,

3:13::x:39

13*x = 3*39

x = 3*39/13 = 9 (Ans)

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Answer 2

Step-by-step explanation:

3:13::x:39

$\frac{3}{13} = \frac{x}{39} \\ 39 \times 3 = 13x \\ x = \frac{39 \times 3}{13} \\ x = 3 \times 3 \\ x = 9$