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Finding the Fourth Proportional to 8,439.64, 12,662.65 and 3,508.87

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Solution

The fourth proportional to 8,439.64, 12,662.65 and 3,508.87 is: 5,264.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,439.64 : 12,662.65 = 3,508.87 : x
  2. Step 2: Convert to fraction form
    8,439.64/12,662.65 = 3,508.87/x
  3. Step 3: Cross multiply
    8,439.64x = 12,662.65 × 3,508.87
  4. Step 4: Simplify right side
    8,439.64x = 44,431,592.71
  5. Step 5: Solve for x
    x = 44,431,592.71/8,439.64
  6. Step 6: Final answer
    x = 5,264.63

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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.