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Finding the Fourth Proportional to 10,387.92, 15,568.92 and 5,195.28

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Solution

The fourth proportional to 10,387.92, 15,568.92 and 5,195.28 is: 7,786.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,387.92 : 15,568.92 = 5,195.28 : x
  2. Step 2: Convert to fraction form
    10,387.92/15,568.92 = 5,195.28/x
  3. Step 3: Cross multiply
    10,387.92x = 15,568.92 × 5,195.28
  4. Step 4: Simplify right side
    10,387.92x = 80,884,898.70
  5. Step 5: Solve for x
    x = 80,884,898.70/10,387.92
  6. Step 6: Final answer
    x = 7,786.44

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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.