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Finding the Fourth Proportional to 8,609.70, 12,902.39 and 3,677.61

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Solution

The fourth proportional to 8,609.70, 12,902.39 and 3,677.61 is: 5,511.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,609.70 : 12,902.39 = 3,677.61 : x
  2. Step 2: Convert to fraction form
    8,609.70/12,902.39 = 3,677.61/x
  3. Step 3: Cross multiply
    8,609.70x = 12,902.39 × 3,677.61
  4. Step 4: Simplify right side
    8,609.70x = 47,449,958.49
  5. Step 5: Solve for x
    x = 47,449,958.49/8,609.70
  6. Step 6: Final answer
    x = 5,511.22

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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.