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Finding the Fourth Proportional to 27.97, 41.92 and 15.78

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Solution

The fourth proportional to 27.97, 41.92 and 15.78 is: 23.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.97 : 41.92 = 15.78 : x
  2. Step 2: Convert to fraction form
    27.97/41.92 = 15.78/x
  3. Step 3: Cross multiply
    27.97x = 41.92 × 15.78
  4. Step 4: Simplify right side
    27.97x = 661.62
  5. Step 5: Solve for x
    x = 661.62/27.97
  6. Step 6: Final answer
    x = 23.66

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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.