Home / 12,318.12-18,476.92-3,998.12

Finding the Fourth Proportional to 12,318.12, 18,476.92 and 3,998.12

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Solution

The fourth proportional to 12,318.12, 18,476.92 and 3,998.12 is: 5,997.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,318.12 : 18,476.92 = 3,998.12 : x
  2. Step 2: Convert to fraction form
    12,318.12/18,476.92 = 3,998.12/x
  3. Step 3: Cross multiply
    12,318.12x = 18,476.92 × 3,998.12
  4. Step 4: Simplify right side
    12,318.12x = 73,872,979.59
  5. Step 5: Solve for x
    x = 73,872,979.59/12,318.12
  6. Step 6: Final answer
    x = 5,997.10

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.