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Finding the Fourth Proportional to 8,438.64, 12,651.11 and 3,511.97

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Solution

The fourth proportional to 8,438.64, 12,651.11 and 3,511.97 is: 5,265.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,438.64 : 12,651.11 = 3,511.97 : x
  2. Step 2: Convert to fraction form
    8,438.64/12,651.11 = 3,511.97/x
  3. Step 3: Cross multiply
    8,438.64x = 12,651.11 × 3,511.97
  4. Step 4: Simplify right side
    8,438.64x = 44,430,237.97
  5. Step 5: Solve for x
    x = 44,430,237.97/8,438.64
  6. Step 6: Final answer
    x = 5,265.09

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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.