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Finding the Fourth Proportional to 8,447.76, 12,666.24 and 3,520.80

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Solution

The fourth proportional to 8,447.76, 12,666.24 and 3,520.80 is: 5,278.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,447.76 : 12,666.24 = 3,520.80 : x
  2. Step 2: Convert to fraction form
    8,447.76/12,666.24 = 3,520.80/x
  3. Step 3: Cross multiply
    8,447.76x = 12,666.24 × 3,520.80
  4. Step 4: Simplify right side
    8,447.76x = 44,595,297.79
  5. Step 5: Solve for x
    x = 44,595,297.79/8,447.76
  6. Step 6: Final answer
    x = 5,278.95

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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.