Question

If 1st,2nd and 4th terms of a proportion are 6,18 and 25 respectively. find its third term

Answer 1

Step-by-step explanation:

Let the 3rd term be x

so,6:18::x:25

extreme=mean

6*25=x*18

150=x*18

150/18=x

6.33=x

Answer 2

Answer:

The third proportion term for the given fourth proportion is 5 .

Step-by-step explanation:

Given as :

The first term = a = 6

The second term = b = 18

The fourth term = 15

Let The third term = n

According to question

All the given four terms are in proportion them

So, We can write the fourth proportion as

a : b : : c : d

i.e 6 : 18 : : n : 15

Or, $\dfrac{6}{18}$  =  $\dfrac{n}{15}$

By cross multiplying

6 × 15 = n × 18

Or, 90 = n × 18

∴  n = $\dfrac{90}{18}$

i.e  n = 5

So, The third proportion term = n = 5

Hence, The third proportion term for the given fourth proportion is 5 . Answer