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Finding the Fourth Proportional to 8,763.13, 13,139.82 and 2,916.55

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Solution

The fourth proportional to 8,763.13, 13,139.82 and 2,916.55 is: 4,373.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,763.13 : 13,139.82 = 2,916.55 : x
  2. Step 2: Convert to fraction form
    8,763.13/13,139.82 = 2,916.55/x
  3. Step 3: Cross multiply
    8,763.13x = 13,139.82 × 2,916.55
  4. Step 4: Simplify right side
    8,763.13x = 38,322,942.02
  5. Step 5: Solve for x
    x = 38,322,942.02/8,763.13
  6. Step 6: Final answer
    x = 4,373.20

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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.