Home / 13,879.38-20,825.91-8,612.97

Finding the Fourth Proportional to 13,879.38, 20,825.91 and 8,612.97

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Solution

The fourth proportional to 13,879.38, 20,825.91 and 8,612.97 is: 12,923.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,879.38 : 20,825.91 = 8,612.97 : x
  2. Step 2: Convert to fraction form
    13,879.38/20,825.91 = 8,612.97/x
  3. Step 3: Cross multiply
    13,879.38x = 20,825.91 × 8,612.97
  4. Step 4: Simplify right side
    13,879.38x = 179,372,859.96
  5. Step 5: Solve for x
    x = 179,372,859.96/13,879.38
  6. Step 6: Final answer
    x = 12,923.69

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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.