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Finding the Fourth Proportional to 18,843.58, 25,994.32 and 12,791.71

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Solution

The fourth proportional to 18,843.58, 25,994.32 and 12,791.71 is: 17,645.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,843.58 : 25,994.32 = 12,791.71 : x
  2. Step 2: Convert to fraction form
    18,843.58/25,994.32 = 12,791.71/x
  3. Step 3: Cross multiply
    18,843.58x = 25,994.32 × 12,791.71
  4. Step 4: Simplify right side
    18,843.58x = 332,511,803.09
  5. Step 5: Solve for x
    x = 332,511,803.09/18,843.58
  6. Step 6: Final answer
    x = 17,645.89

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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.