Home / 28,131.97-38,786.84-18,042.61

Finding the Fourth Proportional to 28,131.97, 38,786.84 and 18,042.61

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Solution

The fourth proportional to 28,131.97, 38,786.84 and 18,042.61 is: 24,876.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,131.97 : 38,786.84 = 18,042.61 : x
  2. Step 2: Convert to fraction form
    28,131.97/38,786.84 = 18,042.61/x
  3. Step 3: Cross multiply
    28,131.97x = 38,786.84 × 18,042.61
  4. Step 4: Simplify right side
    28,131.97x = 699,815,737.04
  5. Step 5: Solve for x
    x = 699,815,737.04/28,131.97
  6. Step 6: Final answer
    x = 24,876.17

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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.