Home / 10,387.20-15,581.61-5,125.04

Finding the Fourth Proportional to 10,387.20, 15,581.61 and 5,125.04

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Solution

The fourth proportional to 10,387.20, 15,581.61 and 5,125.04 is: 7,687.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,387.20 : 15,581.61 = 5,125.04 : x
  2. Step 2: Convert to fraction form
    10,387.20/15,581.61 = 5,125.04/x
  3. Step 3: Cross multiply
    10,387.20x = 15,581.61 × 5,125.04
  4. Step 4: Simplify right side
    10,387.20x = 79,856,296.61
  5. Step 5: Solve for x
    x = 79,856,296.61/10,387.20
  6. Step 6: Final answer
    x = 7,687.95

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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.