Home / 13,131.82-18,121.97-7,163.62

Finding the Fourth Proportional to 13,131.82, 18,121.97 and 7,163.62

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Solution

The fourth proportional to 13,131.82, 18,121.97 and 7,163.62 is: 9,885.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,131.82 : 18,121.97 = 7,163.62 : x
  2. Step 2: Convert to fraction form
    13,131.82/18,121.97 = 7,163.62/x
  3. Step 3: Cross multiply
    13,131.82x = 18,121.97 × 7,163.62
  4. Step 4: Simplify right side
    13,131.82x = 129,818,825.61
  5. Step 5: Solve for x
    x = 129,818,825.61/13,131.82
  6. Step 6: Final answer
    x = 9,885.82

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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.