Home / 20,081.26-27,712.85-12,121.93

Finding the Fourth Proportional to 20,081.26, 27,712.85 and 12,121.93

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Solution

The fourth proportional to 20,081.26, 27,712.85 and 12,121.93 is: 16,728.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,081.26 : 27,712.85 = 12,121.93 : x
  2. Step 2: Convert to fraction form
    20,081.26/27,712.85 = 12,121.93/x
  3. Step 3: Cross multiply
    20,081.26x = 27,712.85 × 12,121.93
  4. Step 4: Simplify right side
    20,081.26x = 335,933,227.80
  5. Step 5: Solve for x
    x = 335,933,227.80/20,081.26
  6. Step 6: Final answer
    x = 16,728.69

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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.