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Finding the Fourth Proportional to 21,801.66, 32,721.17 and 8,663.25

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Solution

The fourth proportional to 21,801.66, 32,721.17 and 8,663.25 is: 13,002.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,801.66 : 32,721.17 = 8,663.25 : x
  2. Step 2: Convert to fraction form
    21,801.66/32,721.17 = 8,663.25/x
  3. Step 3: Cross multiply
    21,801.66x = 32,721.17 × 8,663.25
  4. Step 4: Simplify right side
    21,801.66x = 283,471,755.39
  5. Step 5: Solve for x
    x = 283,471,755.39/21,801.66
  6. Step 6: Final answer
    x = 13,002.30

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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.