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Finding the Fourth Proportional to 17,991.49, 26,988.78 and 6,144.79

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Solution

The fourth proportional to 17,991.49, 26,988.78 and 6,144.79 is: 9,217.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,991.49 : 26,988.78 = 6,144.79 : x
  2. Step 2: Convert to fraction form
    17,991.49/26,988.78 = 6,144.79/x
  3. Step 3: Cross multiply
    17,991.49x = 26,988.78 × 6,144.79
  4. Step 4: Simplify right side
    17,991.49x = 165,840,268.20
  5. Step 5: Solve for x
    x = 165,840,268.20/17,991.49
  6. Step 6: Final answer
    x = 9,217.71

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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.