Question

which number should be substracted from 7,12 and 18 such that the resultant numbers are in continued proportion​

Answer 1

Answer:

-18 need to be subtracted

Step-by-step explanation:

Let say x is substraced from each number

then number would be

7-x , 12-x , 18-x

and (7-x)/(12-x)  = (12-x)/(18-x)

=> (7-x)(18-x) = (12-x)(12-x)

=>126 + x² -25x = 144 + x² - 24x

=> -18 = x

-18 need to be subtracted

numbers would be

25  , 30 , 36

25: 30 :: 5:6

30:36 :: 5:6