Home / 17,991.42-26,996.31-12,135.75

Finding the Fourth Proportional to 17,991.42, 26,996.31 and 12,135.75

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Solution

The fourth proportional to 17,991.42, 26,996.31 and 12,135.75 is: 18,209.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,991.42 : 26,996.31 = 12,135.75 : x
  2. Step 2: Convert to fraction form
    17,991.42/26,996.31 = 12,135.75/x
  3. Step 3: Cross multiply
    17,991.42x = 26,996.31 × 12,135.75
  4. Step 4: Simplify right side
    17,991.42x = 327,620,469.08
  5. Step 5: Solve for x
    x = 327,620,469.08/17,991.42
  6. Step 6: Final answer
    x = 18,209.82

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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.