Question

what is the 4th proportion of 3, 12 and 4​

Answer 1

Answer:

Let x be the fourth proportional

12

3

=

x

4

⇒

4×3

3

=

x

4

⇒

4

1

=

x

4

⇒x=4×4=16

⟹x=4

⇒3,12 & 4,16 are in proportion