Home / 20,081.20-27,712.01-11,006.78

Finding the Fourth Proportional to 20,081.20, 27,712.01 and 11,006.78

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Solution

The fourth proportional to 20,081.20, 27,712.01 and 11,006.78 is: 15,189.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,081.20 : 27,712.01 = 11,006.78 : x
  2. Step 2: Convert to fraction form
    20,081.20/27,712.01 = 11,006.78/x
  3. Step 3: Cross multiply
    20,081.20x = 27,712.01 × 11,006.78
  4. Step 4: Simplify right side
    20,081.20x = 305,019,997.43
  5. Step 5: Solve for x
    x = 305,019,997.43/20,081.20
  6. Step 6: Final answer
    x = 15,189.33

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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.