Question

find the fourth proportional of ( 15:6::7:x )​

Answer 1

Answer:

x = 2.8

Step-by-step explanation:

When a : b :: c : d, then ad = bc ( product of extremes = product of means)

Here,

$15x = 7 \times 6 = 42\\x = \frac{42}{15}=\frac{14}{5}=2.8$

∴ Fourth proportional of 15 : 6 :: 7 : x is 2.8

Hope it helps...