Home / 5,121.73-7,067.55-3,131.97

Finding the Fourth Proportional to 5,121.73, 7,067.55 and 3,131.97

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Solution

The fourth proportional to 5,121.73, 7,067.55 and 3,131.97 is: 4,321.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.73 : 7,067.55 = 3,131.97 : x
  2. Step 2: Convert to fraction form
    5,121.73/7,067.55 = 3,131.97/x
  3. Step 3: Cross multiply
    5,121.73x = 7,067.55 × 3,131.97
  4. Step 4: Simplify right side
    5,121.73x = 22,135,339.82
  5. Step 5: Solve for x
    x = 22,135,339.82/5,121.73
  6. Step 6: Final answer
    x = 4,321.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.