Home / 13,131.27-18,121.40-7,163.16

Finding the Fourth Proportional to 13,131.27, 18,121.40 and 7,163.16

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Solution

The fourth proportional to 13,131.27, 18,121.40 and 7,163.16 is: 9,885.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,131.27 : 18,121.40 = 7,163.16 : x
  2. Step 2: Convert to fraction form
    13,131.27/18,121.40 = 7,163.16/x
  3. Step 3: Cross multiply
    13,131.27x = 18,121.40 × 7,163.16
  4. Step 4: Simplify right side
    13,131.27x = 129,806,414.92
  5. Step 5: Solve for x
    x = 129,806,414.92/13,131.27
  6. Step 6: Final answer
    x = 9,885.29

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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.