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Finding the Fourth Proportional to 29,356.88, 40,512.49 and 16,781.90

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Solution

The fourth proportional to 29,356.88, 40,512.49 and 16,781.90 is: 23,159.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,356.88 : 40,512.49 = 16,781.90 : x
  2. Step 2: Convert to fraction form
    29,356.88/40,512.49 = 16,781.90/x
  3. Step 3: Cross multiply
    29,356.88x = 40,512.49 × 16,781.90
  4. Step 4: Simplify right side
    29,356.88x = 679,876,555.93
  5. Step 5: Solve for x
    x = 679,876,555.93/29,356.88
  6. Step 6: Final answer
    x = 23,159.02

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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.