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Finding the Fourth Proportional to 17.38, 25.91 and 16.89

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Solution

The fourth proportional to 17.38, 25.91 and 16.89 is: 25.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.38 : 25.91 = 16.89 : x
  2. Step 2: Convert to fraction form
    17.38/25.91 = 16.89/x
  3. Step 3: Cross multiply
    17.38x = 25.91 × 16.89
  4. Step 4: Simplify right side
    17.38x = 437.62
  5. Step 5: Solve for x
    x = 437.62/17.38
  6. Step 6: Final answer
    x = 25.18

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.