Home / 13,198.12-18,213.46-7,229.82

Finding the Fourth Proportional to 13,198.12, 18,213.46 and 7,229.82

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Solution

The fourth proportional to 13,198.12, 18,213.46 and 7,229.82 is: 9,977.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,198.12 : 18,213.46 = 7,229.82 : x
  2. Step 2: Convert to fraction form
    13,198.12/18,213.46 = 7,229.82/x
  3. Step 3: Cross multiply
    13,198.12x = 18,213.46 × 7,229.82
  4. Step 4: Simplify right side
    13,198.12x = 131,680,037.38
  5. Step 5: Solve for x
    x = 131,680,037.38/13,198.12
  6. Step 6: Final answer
    x = 9,977.18

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Double scale
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Similar ratio
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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.