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Finding the Fourth Proportional to 18,081.97, 27,129.47 and 8,085.86

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Solution

The fourth proportional to 18,081.97, 27,129.47 and 8,085.86 is: 12,131.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,081.97 : 27,129.47 = 8,085.86 : x
  2. Step 2: Convert to fraction form
    18,081.97/27,129.47 = 8,085.86/x
  3. Step 3: Cross multiply
    18,081.97x = 27,129.47 × 8,085.86
  4. Step 4: Simplify right side
    18,081.97x = 219,365,170.52
  5. Step 5: Solve for x
    x = 219,365,170.52/18,081.97
  6. Step 6: Final answer
    x = 12,131.71

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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.