Home / 13,131-18,121.10-7,163.24

Finding the Fourth Proportional to 13,131, 18,121.10 and 7,163.24

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Solution

The fourth proportional to 13,131, 18,121.10 and 7,163.24 is: 9,885.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,131 : 18,121.10 = 7,163.24 : x
  2. Step 2: Convert to fraction form
    13,131/18,121.10 = 7,163.24/x
  3. Step 3: Cross multiply
    13,131x = 18,121.10 × 7,163.24
  4. Step 4: Simplify right side
    13,131x = 129,805,661.94
  5. Step 5: Solve for x
    x = 129,805,661.94/13,131
  6. Step 6: Final answer
    x = 9,885.44

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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.