Home / 20,099.13-30,138.98-11,781.85

Finding the Fourth Proportional to 20,099.13, 30,138.98 and 11,781.85

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Solution

The fourth proportional to 20,099.13, 30,138.98 and 11,781.85 is: 17,667.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,099.13 : 30,138.98 = 11,781.85 : x
  2. Step 2: Convert to fraction form
    20,099.13/30,138.98 = 11,781.85/x
  3. Step 3: Cross multiply
    20,099.13x = 30,138.98 × 11,781.85
  4. Step 4: Simplify right side
    20,099.13x = 355,092,882.60
  5. Step 5: Solve for x
    x = 355,092,882.60/20,099.13
  6. Step 6: Final answer
    x = 17,667.08

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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.