Home / 20,781,678.10-31,119,373.05-15,360,979.90

Finding the Fourth Proportional to 20,781,678.10, 31,119,373.05 and 15,360,979.90

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Solution

The fourth proportional to 20,781,678.10, 31,119,373.05 and 15,360,979.90 is: 23,002,187.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781,678.10 : 31,119,373.05 = 15,360,979.90 : x
  2. Step 2: Convert to fraction form
    20,781,678.10/31,119,373.05 = 15,360,979.90/x
  3. Step 3: Cross multiply
    20,781,678.10x = 31,119,373.05 × 15,360,979.90
  4. Step 4: Simplify right side
    20,781,678.10x = 478,024,063,921,651.69
  5. Step 5: Solve for x
    x = 478,024,063,921,651.69/20,781,678.10
  6. Step 6: Final answer
    x = 23,002,187.87

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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.