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Finding the Fourth Proportional to 12,972,691.69, 19,470,773.52 and 6,912,542.03

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Solution

The fourth proportional to 12,972,691.69, 19,470,773.52 and 6,912,542.03 is: 10,375,066.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,972,691.69 : 19,470,773.52 = 6,912,542.03 : x
  2. Step 2: Convert to fraction form
    12,972,691.69/19,470,773.52 = 6,912,542.03/x
  3. Step 3: Cross multiply
    12,972,691.69x = 19,470,773.52 × 6,912,542.03
  4. Step 4: Simplify right side
    12,972,691.69x = 134,592,540,216,257.19
  5. Step 5: Solve for x
    x = 134,592,540,216,257.19/12,972,691.69
  6. Step 6: Final answer
    x = 10,375,066.60

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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.