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Finding the Fourth Proportional to 27.92, 42.12 and 26.76

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Solution

The fourth proportional to 27.92, 42.12 and 26.76 is: 40.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.92 : 42.12 = 26.76 : x
  2. Step 2: Convert to fraction form
    27.92/42.12 = 26.76/x
  3. Step 3: Cross multiply
    27.92x = 42.12 × 26.76
  4. Step 4: Simplify right side
    27.92x = 1,127.13
  5. Step 5: Solve for x
    x = 1,127.13/27.92
  6. Step 6: Final answer
    x = 40.37

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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.