Home / 13,998.38-20,998.78-3,610.13

Finding the Fourth Proportional to 13,998.38, 20,998.78 and 3,610.13

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Solution

The fourth proportional to 13,998.38, 20,998.78 and 3,610.13 is: 5,415.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,998.38 : 20,998.78 = 3,610.13 : x
  2. Step 2: Convert to fraction form
    13,998.38/20,998.78 = 3,610.13/x
  3. Step 3: Cross multiply
    13,998.38x = 20,998.78 × 3,610.13
  4. Step 4: Simplify right side
    13,998.38x = 75,808,211.62
  5. Step 5: Solve for x
    x = 75,808,211.62/13,998.38
  6. Step 6: Final answer
    x = 5,415.50

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Half scale
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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.