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Finding the Fourth Proportional to 8,487.38, 12,728.09 and 3,488.33

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Solution

The fourth proportional to 8,487.38, 12,728.09 and 3,488.33 is: 5,231.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,487.38 : 12,728.09 = 3,488.33 : x
  2. Step 2: Convert to fraction form
    8,487.38/12,728.09 = 3,488.33/x
  3. Step 3: Cross multiply
    8,487.38x = 12,728.09 × 3,488.33
  4. Step 4: Simplify right side
    8,487.38x = 44,399,818.73
  5. Step 5: Solve for x
    x = 44,399,818.73/8,487.38
  6. Step 6: Final answer
    x = 5,231.27

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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.