Question

Find the value of a in the following proportion 7 : 21 : : a : 63

Answer 1

Answer:

21 is the value of a ......

Answer 2

Step-by-step explanation:

7 / 21 = a / 63

1 / 3 = a / 63

1 × 63 / 3 = a

63 / 3 = a

21 = a

Therefore, a = 21