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Finding the Fourth Proportional to 14,498,978.74, 20,008,052.80 and 7,972,219.87

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Solution

The fourth proportional to 14,498,978.74, 20,008,052.80 and 7,972,219.87 is: 11,001,367.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,498,978.74 : 20,008,052.80 = 7,972,219.87 : x
  2. Step 2: Convert to fraction form
    14,498,978.74/20,008,052.80 = 7,972,219.87/x
  3. Step 3: Cross multiply
    14,498,978.74x = 20,008,052.80 × 7,972,219.87
  4. Step 4: Simplify right side
    14,498,978.74x = 159,508,596,092,169.16
  5. Step 5: Solve for x
    x = 159,508,596,092,169.16/14,498,978.74
  6. Step 6: Final answer
    x = 11,001,367.68

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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.