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Finding the Fourth Proportional to 12,239,687.70, 18,359,531.55 and 7,368,801.30

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Solution

The fourth proportional to 12,239,687.70, 18,359,531.55 and 7,368,801.30 is: 11,053,201.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,239,687.70 : 18,359,531.55 = 7,368,801.30 : x
  2. Step 2: Convert to fraction form
    12,239,687.70/18,359,531.55 = 7,368,801.30/x
  3. Step 3: Cross multiply
    12,239,687.70x = 18,359,531.55 × 7,368,801.30
  4. Step 4: Simplify right side
    12,239,687.70x = 135,287,739,953,031.02
  5. Step 5: Solve for x
    x = 135,287,739,953,031.02/12,239,687.70
  6. Step 6: Final answer
    x = 11,053,201.95

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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.