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Finding the Fourth Proportional to 8,475.67, 12,711.48 and 2,929.21

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Solution

The fourth proportional to 8,475.67, 12,711.48 and 2,929.21 is: 4,393.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,475.67 : 12,711.48 = 2,929.21 : x
  2. Step 2: Convert to fraction form
    8,475.67/12,711.48 = 2,929.21/x
  3. Step 3: Cross multiply
    8,475.67x = 12,711.48 × 2,929.21
  4. Step 4: Simplify right side
    8,475.67x = 37,234,594.33
  5. Step 5: Solve for x
    x = 37,234,594.33/8,475.67
  6. Step 6: Final answer
    x = 4,393.12

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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.