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Finding the Fourth Proportional to 8,478.62, 12,717.94 and 3,545.56

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Solution

The fourth proportional to 8,478.62, 12,717.94 and 3,545.56 is: 5,318.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,478.62 : 12,717.94 = 3,545.56 : x
  2. Step 2: Convert to fraction form
    8,478.62/12,717.94 = 3,545.56/x
  3. Step 3: Cross multiply
    8,478.62x = 12,717.94 × 3,545.56
  4. Step 4: Simplify right side
    8,478.62x = 45,092,219.35
  5. Step 5: Solve for x
    x = 45,092,219.35/8,478.62
  6. Step 6: Final answer
    x = 5,318.34

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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.