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Finding the Fourth Proportional to 17.75, 26.62 and 7.61

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Solution

The fourth proportional to 17.75, 26.62 and 7.61 is: 11.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.75 : 26.62 = 7.61 : x
  2. Step 2: Convert to fraction form
    17.75/26.62 = 7.61/x
  3. Step 3: Cross multiply
    17.75x = 26.62 × 7.61
  4. Step 4: Simplify right side
    17.75x = 202.43
  5. Step 5: Solve for x
    x = 202.43/17.75
  6. Step 6: Final answer
    x = 11.41

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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.