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Finding the Fourth Proportional to 21,551.10, 29,734.71 and 12,600.80

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Solution

The fourth proportional to 21,551.10, 29,734.71 and 12,600.80 is: 17,385.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,551.10 : 29,734.71 = 12,600.80 : x
  2. Step 2: Convert to fraction form
    21,551.10/29,734.71 = 12,600.80/x
  3. Step 3: Cross multiply
    21,551.10x = 29,734.71 × 12,600.80
  4. Step 4: Simplify right side
    21,551.10x = 374,681,160.85
  5. Step 5: Solve for x
    x = 374,681,160.85/21,551.10
  6. Step 6: Final answer
    x = 17,385.71

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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.