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Finding the Fourth Proportional to 27, 40.32 and 21.92

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Solution

The fourth proportional to 27, 40.32 and 21.92 is: 32.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    27 : 40.32 = 21.92 : x
  2. Step 2: Convert to fraction form
    27/40.32 = 21.92/x
  3. Step 3: Cross multiply
    27x = 40.32 × 21.92
  4. Step 4: Simplify right side
    27x = 883.61
  5. Step 5: Solve for x
    x = 883.61/27
  6. Step 6: Final answer
    x = 32.73

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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.