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Finding the Fourth Proportional to 27.72, 41.36 and 26.55

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Solution

The fourth proportional to 27.72, 41.36 and 26.55 is: 39.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.72 : 41.36 = 26.55 : x
  2. Step 2: Convert to fraction form
    27.72/41.36 = 26.55/x
  3. Step 3: Cross multiply
    27.72x = 41.36 × 26.55
  4. Step 4: Simplify right side
    27.72x = 1,097.98
  5. Step 5: Solve for x
    x = 1,097.98/27.72
  6. Step 6: Final answer
    x = 39.61

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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.