Question

fourth propotional of 3,15,4?

Answer 1

Question :- Find the fourth proportional of 3, 15, 4


Solution :-

We may write the four numbers or quantities as a : b = c : d or a/b = c/d

In this question, first 3 numbers are given.

Let a be 3, b be 15, c be 4 and d be x


According to the given condition

3 : 15 = 4 : x

or 3/15 = 4/x

Cross multiply

∴ 3x = 15 × 4

∴ 3x = 60

∴ x = 20


∴ Fourth proportional of 3, 15 and 4 is $\boxed{\boxed{\tt{20}}}$

Answer 2

Answer:

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