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Finding the Fourth Proportional to 21,648.87, 29,865.17 and 14,092.45

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Solution

The fourth proportional to 21,648.87, 29,865.17 and 14,092.45 is: 19,440.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,648.87 : 29,865.17 = 14,092.45 : x
  2. Step 2: Convert to fraction form
    21,648.87/29,865.17 = 14,092.45/x
  3. Step 3: Cross multiply
    21,648.87x = 29,865.17 × 14,092.45
  4. Step 4: Simplify right side
    21,648.87x = 420,873,375.53
  5. Step 5: Solve for x
    x = 420,873,375.53/21,648.87
  6. Step 6: Final answer
    x = 19,440.89

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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.