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Finding the Fourth Proportional to 20,899,830.62, 28,842,122.80 and 11,481,018.72

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Solution

The fourth proportional to 20,899,830.62, 28,842,122.80 and 11,481,018.72 is: 15,844,001.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,899,830.62 : 28,842,122.80 = 11,481,018.72 : x
  2. Step 2: Convert to fraction form
    20,899,830.62/28,842,122.80 = 11,481,018.72/x
  3. Step 3: Cross multiply
    20,899,830.62x = 28,842,122.80 × 11,481,018.72
  4. Step 4: Simplify right side
    20,899,830.62x = 331,136,951,791,338.88
  5. Step 5: Solve for x
    x = 331,136,951,791,338.88/20,899,830.62
  6. Step 6: Final answer
    x = 15,844,001.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.