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Finding the Fourth Proportional to 13,811,214.20, 20,715,006.90 and 4,227,553.40

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Solution

The fourth proportional to 13,811,214.20, 20,715,006.90 and 4,227,553.40 is: 6,340,774.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,811,214.20 : 20,715,006.90 = 4,227,553.40 : x
  2. Step 2: Convert to fraction form
    13,811,214.20/20,715,006.90 = 4,227,553.40/x
  3. Step 3: Cross multiply
    13,811,214.20x = 20,715,006.90 × 4,227,553.40
  4. Step 4: Simplify right side
    13,811,214.20x = 87,573,797,851,118.47
  5. Step 5: Solve for x
    x = 87,573,797,851,118.47/13,811,214.20
  6. Step 6: Final answer
    x = 6,340,774.72

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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.