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Finding the Fourth Proportional to 13,391.80, 18,481.79 and 7,425.24

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Solution

The fourth proportional to 13,391.80, 18,481.79 and 7,425.24 is: 10,247.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,391.80 : 18,481.79 = 7,425.24 : x
  2. Step 2: Convert to fraction form
    13,391.80/18,481.79 = 7,425.24/x
  3. Step 3: Cross multiply
    13,391.80x = 18,481.79 × 7,425.24
  4. Step 4: Simplify right side
    13,391.80x = 137,231,726.38
  5. Step 5: Solve for x
    x = 137,231,726.38/13,391.80
  6. Step 6: Final answer
    x = 10,247.44

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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.