Home / 20,730.38-31,100.42-6,879.38

Finding the Fourth Proportional to 20,730.38, 31,100.42 and 6,879.38

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Solution

The fourth proportional to 20,730.38, 31,100.42 and 6,879.38 is: 10,320.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.38 : 31,100.42 = 6,879.38 : x
  2. Step 2: Convert to fraction form
    20,730.38/31,100.42 = 6,879.38/x
  3. Step 3: Cross multiply
    20,730.38x = 31,100.42 × 6,879.38
  4. Step 4: Simplify right side
    20,730.38x = 213,951,469.04
  5. Step 5: Solve for x
    x = 213,951,469.04/20,730.38
  6. Step 6: Final answer
    x = 10,320.68

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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.