Home / 5,121.31-7,067.55-3,131.83

Finding the Fourth Proportional to 5,121.31, 7,067.55 and 3,131.83

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Solution

The fourth proportional to 5,121.31, 7,067.55 and 3,131.83 is: 4,322.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.31 : 7,067.55 = 3,131.83 : x
  2. Step 2: Convert to fraction form
    5,121.31/7,067.55 = 3,131.83/x
  3. Step 3: Cross multiply
    5,121.31x = 7,067.55 × 3,131.83
  4. Step 4: Simplify right side
    5,121.31x = 22,134,365.12
  5. Step 5: Solve for x
    x = 22,134,365.12/5,121.31
  6. Step 6: Final answer
    x = 4,322.01

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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.