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Finding the Fourth Proportional to 27.62, 41.47 and 20.83

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Solution

The fourth proportional to 27.62, 41.47 and 20.83 is: 31.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.62 : 41.47 = 20.83 : x
  2. Step 2: Convert to fraction form
    27.62/41.47 = 20.83/x
  3. Step 3: Cross multiply
    27.62x = 41.47 × 20.83
  4. Step 4: Simplify right side
    27.62x = 863.66
  5. Step 5: Solve for x
    x = 863.66/27.62
  6. Step 6: Final answer
    x = 31.28

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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.