Home / 20,515.20-28,293.12-16,535.04

Finding the Fourth Proportional to 20,515.20, 28,293.12 and 16,535.04

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Solution

The fourth proportional to 20,515.20, 28,293.12 and 16,535.04 is: 22,803.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.20 : 28,293.12 = 16,535.04 : x
  2. Step 2: Convert to fraction form
    20,515.20/28,293.12 = 16,535.04/x
  3. Step 3: Cross multiply
    20,515.20x = 28,293.12 × 16,535.04
  4. Step 4: Simplify right side
    20,515.20x = 467,827,870.92
  5. Step 5: Solve for x
    x = 467,827,870.92/20,515.20
  6. Step 6: Final answer
    x = 22,803.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.