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Finding the Fourth Proportional to 36,251.60, 54,379.20 and 12,879.86

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Solution

The fourth proportional to 36,251.60, 54,379.20 and 12,879.86 is: 19,320.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,251.60 : 54,379.20 = 12,879.86 : x
  2. Step 2: Convert to fraction form
    36,251.60/54,379.20 = 12,879.86/x
  3. Step 3: Cross multiply
    36,251.60x = 54,379.20 × 12,879.86
  4. Step 4: Simplify right side
    36,251.60x = 700,396,482.91
  5. Step 5: Solve for x
    x = 700,396,482.91/36,251.60
  6. Step 6: Final answer
    x = 19,320.43

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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.