Home / 12,391.38-17,101.13-7,674.75

Finding the Fourth Proportional to 12,391.38, 17,101.13 and 7,674.75

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Solution

The fourth proportional to 12,391.38, 17,101.13 and 7,674.75 is: 10,591.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,391.38 : 17,101.13 = 7,674.75 : x
  2. Step 2: Convert to fraction form
    12,391.38/17,101.13 = 7,674.75/x
  3. Step 3: Cross multiply
    12,391.38x = 17,101.13 × 7,674.75
  4. Step 4: Simplify right side
    12,391.38x = 131,246,859.09
  5. Step 5: Solve for x
    x = 131,246,859.09/12,391.38
  6. Step 6: Final answer
    x = 10,591.79

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Half scale
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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.