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Finding the Fourth Proportional to 8,447.76, 12,662.85 and 3,179.15

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Solution

The fourth proportional to 8,447.76, 12,662.85 and 3,179.15 is: 4,765.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,447.76 : 12,662.85 = 3,179.15 : x
  2. Step 2: Convert to fraction form
    8,447.76/12,662.85 = 3,179.15/x
  3. Step 3: Cross multiply
    8,447.76x = 12,662.85 × 3,179.15
  4. Step 4: Simplify right side
    8,447.76x = 40,257,077.79
  5. Step 5: Solve for x
    x = 40,257,077.79/8,447.76
  6. Step 6: Final answer
    x = 4,765.41

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1.5x scale

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.