Number should be subtracted from each of the numbers 23, 30, 57 and 78.

What number should be subtracted from each of the numbers 23, 30, 57 and 78 so that the remainders are in proportion? (2004)

Solution:

If 2x – 1, 5x – 6, 6x + 2, and 15x – 9 are in proportion, find the value of x.

Solution:

More Solutions:

• If x + 5 is the mean proportion between x + 2 and x + 9.
• Find two numbers such that the mean proportional.
• If b is the mean proportional between a and c.
• Prove that a, b, c and d are in proportion.
• Prove that, If (x/a) = (y/b) = (z/c).
• Prove that, if (a/b) = (c/d) = (e/f).