Question

Find the values of x if the following ratios are in
direct proportion
(1) 15:12 and x:36 (i) 12:x and 30:15
(1) 3.4: 22.1 and x:7.15
​

Answer 1

$\bf{QUESTIONS:-}$

Find the values of x if the following ratios are in direct proportion:-

⇨ 15:12 and x:36

⇨ 12:x and 30:15

$\bf \red{FORMULA:-}$

Product of mean = Product of extreme

$\bf \orange{☆ANSWER:- 1}$

$15:12 \: and \: x:36 \\ \\ 15×36 = 12×x \\ \\ 540 = x \times 12 \\ \\ x = \frac{540}{12} \\ \\ x = 45$

$\bf \orange{☆ANSWER:- 2}$

$12:x \: and \: 30:15 \\ \\ 12×15=30×x \\ \\ 180 = x \times 30 \\ \\ x = \frac{180}{30} \\ \\ x = 6$