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Finding the Fourth Proportional to 8,761.15, 13,143.82 and 2,917.81

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Solution

The fourth proportional to 8,761.15, 13,143.82 and 2,917.81 is: 4,377.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,761.15 : 13,143.82 = 2,917.81 : x
  2. Step 2: Convert to fraction form
    8,761.15/13,143.82 = 2,917.81/x
  3. Step 3: Cross multiply
    8,761.15x = 13,143.82 × 2,917.81
  4. Step 4: Simplify right side
    8,761.15x = 38,351,169.43
  5. Step 5: Solve for x
    x = 38,351,169.43/8,761.15
  6. Step 6: Final answer
    x = 4,377.41

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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.