Which of the following are in proportion?
$4 : 7$ and $12 : 21$

Open in App

Solution

First we write the ratios in fraction form,
$4 : 7 =$ $\frac{4}{7}$ and $12 : 21 =$ $\frac{12}{21} = \frac{12 \div 3}{21 \div 3} = \frac{4}{7}$
Hence $4 : 7 = 12 : 21$
So these are in proportion .

Suggest Corrections

Similar questions

12 : 21 and 72 :126 are in proportion. Which of the following is correct?

State which of the following are in proportions.

(iii) $10 : 21 : : 4 : 8.4$

2, 7, 14, 49

3, 21, 5, 35

2, 11, 4, 21

\frac{7}{21} = \frac{4}{?}

p

q

$p$	$1$	$2$	$3$	$4$
$q$	$3$	$7$	$11$	$12$

Join BYJU'S Learning Program