Home / 20,128.20-30,155.85-16,410.30

Finding the Fourth Proportional to 20,128.20, 30,155.85 and 16,410.30

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Solution

The fourth proportional to 20,128.20, 30,155.85 and 16,410.30 is: 24,585.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.20 : 30,155.85 = 16,410.30 : x
  2. Step 2: Convert to fraction form
    20,128.20/30,155.85 = 16,410.30/x
  3. Step 3: Cross multiply
    20,128.20x = 30,155.85 × 16,410.30
  4. Step 4: Simplify right side
    20,128.20x = 494,866,545.26
  5. Step 5: Solve for x
    x = 494,866,545.26/20,128.20
  6. Step 6: Final answer
    x = 24,585.73

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