Question

if the ratios 3:5 and x:20 are in proportion find the value of
12 if angles of a triangler​

Answer 1

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If the ratios 3:5 and x:20 are in proportion find the value of x.

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3:5 :: x:20

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The value of x.

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3:5 :: x:20

➳ $\frac{3}{5}$ = $\frac{x}{20}$

➳ 5x = (20×3)

➳ 5x = 60

➳ x = $\frac{60}{5}$

➳ x = 12

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x = 12

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The value of x is 12.

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3:5 :: x:20

➳ 3:5 :: 12:20    {cross multiplication}

➳ $\frac{3}{5}$ = $\frac{12}{20}$

➳ $\frac{3}{5}$ = $\frac{12÷4}{20÷4}$

➳ $\frac{3}{5}$ = $\frac{3}{5}$

So, L.H.S = R.H.S.

Hence, verified.

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