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Finding the Fourth Proportional to 26.17, 36.12 and 20.71

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Solution

The fourth proportional to 26.17, 36.12 and 20.71 is: 28.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    26.17 : 36.12 = 20.71 : x
  2. Step 2: Convert to fraction form
    26.17/36.12 = 20.71/x
  3. Step 3: Cross multiply
    26.17x = 36.12 × 20.71
  4. Step 4: Simplify right side
    26.17x = 747.86
  5. Step 5: Solve for x
    x = 747.86/26.17
  6. Step 6: Final answer
    x = 28.58

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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.