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Finding the Fourth Proportional to 19,959, 29,938.66 and 8,862.70

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Solution

The fourth proportional to 19,959, 29,938.66 and 8,862.70 is: 13,294.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,959 : 29,938.66 = 8,862.70 : x
  2. Step 2: Convert to fraction form
    19,959/29,938.66 = 8,862.70/x
  3. Step 3: Cross multiply
    19,959x = 29,938.66 × 8,862.70
  4. Step 4: Simplify right side
    19,959x = 265,337,361.98
  5. Step 5: Solve for x
    x = 265,337,361.98/19,959
  6. Step 6: Final answer
    x = 13,294.12

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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.