Advertisements
Advertisements
Question
Find the third proportion to the following :
`9/25` and `18/25`
Advertisements
Solution
Let x be the third proportion
`9/25 : 18/25 :: 18/25 : "x"`
`=> 9/25 xx "x" = 18/25 xx 18/25`
`= "x" = 18/25 xx 18/25 xx 25/9`
`= "x" = 36/25`
The third proportion is `36/25`
APPEARS IN
RELATED QUESTIONS
If b is the mean proportion between a and c, show that: `(a^4 + a^2b^2 + b^4)/(b^4 + b^2c^2 + c^4) = a^2/c^2`.
Find the value of the unknown in the following proportion :
c
Find the smallest number that must be subtracted from each of the numbers 20, 29, 84 and 129 so that they are in proportion.
Find the fourth proportional to 3, 12, 15
A given quantity of rice is sufficient for 60 persons for 3 days. How many days would the rice last for 18 persons?
If a, b, c, d are in proportion, then
If 24 workers can build a wall in 15 days, how many days will 8 workers take to build a similar wall?
If b is the mean proportional between a and c, prove that (ab + bc) is the mean proportional between (a² + b²) and (b² + c²).
If a, b, c, d, e are in continued proportion, prove that: a : e = a4 : b4.
Write True (T) or False (F) against the following statement:
0.9 : 0.36 : : 10 : 4
