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Finding the Fourth Proportional to 8,763.31, 13,140.10 and 2,916.73

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Solution

The fourth proportional to 8,763.31, 13,140.10 and 2,916.73 is: 4,373.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,763.31 : 13,140.10 = 2,916.73 : x
  2. Step 2: Convert to fraction form
    8,763.31/13,140.10 = 2,916.73/x
  3. Step 3: Cross multiply
    8,763.31x = 13,140.10 × 2,916.73
  4. Step 4: Simplify right side
    8,763.31x = 38,326,123.87
  5. Step 5: Solve for x
    x = 38,326,123.87/8,763.31
  6. Step 6: Final answer
    x = 4,373.48

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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.