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Finding the Fourth Proportional to 8,478.33, 12,719.31 and 3,545.43

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Solution

The fourth proportional to 8,478.33, 12,719.31 and 3,545.43 is: 5,318.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,478.33 : 12,719.31 = 3,545.43 : x
  2. Step 2: Convert to fraction form
    8,478.33/12,719.31 = 3,545.43/x
  3. Step 3: Cross multiply
    8,478.33x = 12,719.31 × 3,545.43
  4. Step 4: Simplify right side
    8,478.33x = 45,095,423.25
  5. Step 5: Solve for x
    x = 45,095,423.25/8,478.33
  6. Step 6: Final answer
    x = 5,318.90

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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.