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Finding the Fourth Proportional to 27.96, 42.16 and 27.66

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Solution

The fourth proportional to 27.96, 42.16 and 27.66 is: 41.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.96 : 42.16 = 27.66 : x
  2. Step 2: Convert to fraction form
    27.96/42.16 = 27.66/x
  3. Step 3: Cross multiply
    27.96x = 42.16 × 27.66
  4. Step 4: Simplify right side
    27.96x = 1,165.93
  5. Step 5: Solve for x
    x = 1,165.93/27.96
  6. Step 6: Final answer
    x = 41.70

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.