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Finding the Fourth Proportional to 8,871.92, 13,310.94 and 3,945.02

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Solution

The fourth proportional to 8,871.92, 13,310.94 and 3,945.02 is: 5,918.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,871.92 : 13,310.94 = 3,945.02 : x
  2. Step 2: Convert to fraction form
    8,871.92/13,310.94 = 3,945.02/x
  3. Step 3: Cross multiply
    8,871.92x = 13,310.94 × 3,945.02
  4. Step 4: Simplify right side
    8,871.92x = 52,511,924.52
  5. Step 5: Solve for x
    x = 52,511,924.52/8,871.92
  6. Step 6: Final answer
    x = 5,918.89

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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.