Fourth proportion to 12 , 18, and 6 is same as the third proportion to k and 6 .What is the value of k ?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 4
Calculations :
Let x be the fourth proportion of 12, 18 and 6
⇒ 12/18 = 6/x
⇒ x = 9
x = 9 is the third proportion of k and 6, so
⇒ k/6 = 6/9
⇒ k = 4
Hence, the value of k is 4.