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Finding the Fourth Proportional to 8,876.61, 13,318.08 and 3,945.81

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Solution

The fourth proportional to 8,876.61, 13,318.08 and 3,945.81 is: 5,920.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,876.61 : 13,318.08 = 3,945.81 : x
  2. Step 2: Convert to fraction form
    8,876.61/13,318.08 = 3,945.81/x
  3. Step 3: Cross multiply
    8,876.61x = 13,318.08 × 3,945.81
  4. Step 4: Simplify right side
    8,876.61x = 52,550,613.24
  5. Step 5: Solve for x
    x = 52,550,613.24/8,876.61
  6. Step 6: Final answer
    x = 5,920.12

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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.