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Finding the Fourth Proportional to 27.18, 40.54 and 26.76

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Solution

The fourth proportional to 27.18, 40.54 and 26.76 is: 39.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.18 : 40.54 = 26.76 : x
  2. Step 2: Convert to fraction form
    27.18/40.54 = 26.76/x
  3. Step 3: Cross multiply
    27.18x = 40.54 × 26.76
  4. Step 4: Simplify right side
    27.18x = 1,084.85
  5. Step 5: Solve for x
    x = 1,084.85/27.18
  6. Step 6: Final answer
    x = 39.91

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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.