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Finding the Fourth Proportional to 8,871.92, 13,281.31 and 8,556.49

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Solution

The fourth proportional to 8,871.92, 13,281.31 and 8,556.49 is: 12,809.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,871.92 : 13,281.31 = 8,556.49 : x
  2. Step 2: Convert to fraction form
    8,871.92/13,281.31 = 8,556.49/x
  3. Step 3: Cross multiply
    8,871.92x = 13,281.31 × 8,556.49
  4. Step 4: Simplify right side
    8,871.92x = 113,641,396.20
  5. Step 5: Solve for x
    x = 113,641,396.20/8,871.92
  6. Step 6: Final answer
    x = 12,809.11

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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.