Home / 13,131.38-18,121.62-7,163.61

Finding the Fourth Proportional to 13,131.38, 18,121.62 and 7,163.61

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Solution

The fourth proportional to 13,131.38, 18,121.62 and 7,163.61 is: 9,885.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,131.38 : 18,121.62 = 7,163.61 : x
  2. Step 2: Convert to fraction form
    13,131.38/18,121.62 = 7,163.61/x
  3. Step 3: Cross multiply
    13,131.38x = 18,121.62 × 7,163.61
  4. Step 4: Simplify right side
    13,131.38x = 129,816,218.25
  5. Step 5: Solve for x
    x = 129,816,218.25/13,131.38
  6. Step 6: Final answer
    x = 9,885.96

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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.