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Finding the Fourth Proportional to 8,375.40, 12,565.98 and 5,251.65

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Solution

The fourth proportional to 8,375.40, 12,565.98 and 5,251.65 is: 7,879.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,375.40 : 12,565.98 = 5,251.65 : x
  2. Step 2: Convert to fraction form
    8,375.40/12,565.98 = 5,251.65/x
  3. Step 3: Cross multiply
    8,375.40x = 12,565.98 × 5,251.65
  4. Step 4: Simplify right side
    8,375.40x = 65,992,128.87
  5. Step 5: Solve for x
    x = 65,992,128.87/8,375.40
  6. Step 6: Final answer
    x = 7,879.28

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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.