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Finding the Fourth Proportional to 26.92, 37.11 and 20.77

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Solution

The fourth proportional to 26.92, 37.11 and 20.77 is: 28.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    26.92 : 37.11 = 20.77 : x
  2. Step 2: Convert to fraction form
    26.92/37.11 = 20.77/x
  3. Step 3: Cross multiply
    26.92x = 37.11 × 20.77
  4. Step 4: Simplify right side
    26.92x = 770.77
  5. Step 5: Solve for x
    x = 770.77/26.92
  6. Step 6: Final answer
    x = 28.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.