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Finding the Fourth Proportional to 17.69, 24.39 and 15.89

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Solution

The fourth proportional to 17.69, 24.39 and 15.89 is: 21.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.69 : 24.39 = 15.89 : x
  2. Step 2: Convert to fraction form
    17.69/24.39 = 15.89/x
  3. Step 3: Cross multiply
    17.69x = 24.39 × 15.89
  4. Step 4: Simplify right side
    17.69x = 387.44
  5. Step 5: Solve for x
    x = 387.44/17.69
  6. Step 6: Final answer
    x = 21.91

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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.