Find the fourth proportional of 15, 25 and 12.
20
The fourth proportional is found using the formula: If a, b, c, and d are in proportion, then (a × d) = (b × c). Substituting the given values: (15 × d) = (25 × 12) ⇒ d = (25 × 12) ÷ 15 ⇒ d = 20 Thus, the fourth proportional is 20.
Important Questions from Arithmetic Progression
If the nth term of a sequence is \(\frac{2 n+5}{7}\), then what is the sum of its first 140 terms?
What is the arithmetic mean of first 8 multiples of 13?
The average of five consecutive odd natural numbers is 27. The product of the first and fifth number is:
Find the sum of all the numbers between 100 to 200 which are divisible by 12.
In a garden, there are 6 daisy plants the first year. Each year, a gardener adds 3 new daisy plants the first year and loses 2 each year. He has 26 jasmine plants the first year and loses 2 each year. When will the number of daisy plants equal the number of jasmine plants after the first year?
