Home / 21,708-32,562-7,857

Finding the Fourth Proportional to 21,708, 32,562 and 7,857

Calculator

Solution

The fourth proportional to 21,708, 32,562 and 7,857 is: 11,785.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,708 : 32,562 = 7,857 : x
  2. Step 2: Convert to fraction form
    21,708/32,562 = 7,857/x
  3. Step 3: Cross multiply
    21,708x = 32,562 × 7,857
  4. Step 4: Simplify right side
    21,708x = 255,839,634
  5. Step 5: Solve for x
    x = 255,839,634/21,708
  6. Step 6: Final answer
    x = 11,785.50

Related Problems

Find fourth proportional to 10,854, 16,281 and 3,928.50
Half scale
Find fourth proportional to 43,416, 65,124 and 15,714
Double scale
Find fourth proportional to 21,709, 32,563.50 and 7,858
Similar ratio
Find fourth proportional to 32,562, 48,843 and 11,785.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.