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Finding the Fourth Proportional to 18,679,337.10, 28,019,005.65 and 15,490,691.10

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Solution

The fourth proportional to 18,679,337.10, 28,019,005.65 and 15,490,691.10 is: 23,236,036.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,679,337.10 : 28,019,005.65 = 15,490,691.10 : x
  2. Step 2: Convert to fraction form
    18,679,337.10/28,019,005.65 = 15,490,691.10/x
  3. Step 3: Cross multiply
    18,679,337.10x = 28,019,005.65 × 15,490,691.10
  4. Step 4: Simplify right side
    18,679,337.10x = 434,033,761,453,304.69
  5. Step 5: Solve for x
    x = 434,033,761,453,304.69/18,679,337.10
  6. Step 6: Final answer
    x = 23,236,036.65

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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.