If 2- 7- x - 21- find the value of x-A- 4B- 6C- 8D- 10

The correct option is B 6The two ratios in proportion can be written as 2/7 = nbsp;x/21 Multiplying both sides by 21, ⇒ nbsp;2/7 nbsp;× 21 = nbsp;x/21 ...

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Standard VI

Mathematics

Proportions

If 2: 7:: x :...

Question

If 2 : 7 :: x : 21, find the value of x.

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Solution

The correct option is B 6
The two ratios in proportion can be written as
$\frac{2}{7}$ = $\frac{x}{21}$
Multiplying both sides by 21,
⇒ $\frac{2}{7}$ × 21 = $\frac{x}{21}$ × 21
⇒ x = 2 × 3 = 6
Thus, the value of x is 6.

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If 2 : 7 :: x : 21, find the value of x.

The correct option is B 6The two ratios in proportion can be written as 27 = x21 Multiplying both sides by 21, ⇒ 27 × 21 = x21 × 21 ⇒ x = 2 × 3 = 6 Thus, the value of x is 6.

The correct option is B 6
The two ratios in proportion can be written as
$\frac{2}{7}$ = $\frac{x}{21}$
Multiplying both sides by 21,
⇒ $\frac{2}{7}$ × 21 = $\frac{x}{21}$ × 21
⇒ x = 2 × 3 = 6
Thus, the value of x is 6.