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Finding the Fourth Proportional to 8,606.67, 12,909.60 and 3,408.90

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Solution

The fourth proportional to 8,606.67, 12,909.60 and 3,408.90 is: 5,113.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,606.67 : 12,909.60 = 3,408.90 : x
  2. Step 2: Convert to fraction form
    8,606.67/12,909.60 = 3,408.90/x
  3. Step 3: Cross multiply
    8,606.67x = 12,909.60 × 3,408.90
  4. Step 4: Simplify right side
    8,606.67x = 44,007,535.44
  5. Step 5: Solve for x
    x = 44,007,535.44/8,606.67
  6. Step 6: Final answer
    x = 5,113.19

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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.