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Finding the Fourth Proportional to 21,174, 31,761 and 8,862

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Solution

The fourth proportional to 21,174, 31,761 and 8,862 is: 13,293

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,174 : 31,761 = 8,862 : x
  2. Step 2: Convert to fraction form
    21,174/31,761 = 8,862/x
  3. Step 3: Cross multiply
    21,174x = 31,761 × 8,862
  4. Step 4: Simplify right side
    21,174x = 281,465,982
  5. Step 5: Solve for x
    x = 281,465,982/21,174
  6. Step 6: Final answer
    x = 13,293

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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.