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Finding the Fourth Proportional to 33.25, 45.85 and 20.95

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Solution

The fourth proportional to 33.25, 45.85 and 20.95 is: 28.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    33.25 : 45.85 = 20.95 : x
  2. Step 2: Convert to fraction form
    33.25/45.85 = 20.95/x
  3. Step 3: Cross multiply
    33.25x = 45.85 × 20.95
  4. Step 4: Simplify right side
    33.25x = 960.56
  5. Step 5: Solve for x
    x = 960.56/33.25
  6. Step 6: Final answer
    x = 28.89

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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.