Question

2.1,28,4.2 find the fourth proportion to the no.​

Answer 1

Step-by-step explanation:

2.1 : 28 :: 4.2:x

x= (28 × 4.2 )/2 .1 = 56

Answer 2

a:b::c:d

2.1: 28::4.2:?

a/b=c/d

=>2.1/28=4.2/d

=>2.1×d=28×4.2 (By cross multiplication)

=>2.1d=117.6

=>d=117.6/2.1

=56(Ans)