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Finding the Fourth Proportional to 23.75, 35.49 and 20.55

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Solution

The fourth proportional to 23.75, 35.49 and 20.55 is: 30.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    23.75 : 35.49 = 20.55 : x
  2. Step 2: Convert to fraction form
    23.75/35.49 = 20.55/x
  3. Step 3: Cross multiply
    23.75x = 35.49 × 20.55
  4. Step 4: Simplify right side
    23.75x = 729.32
  5. Step 5: Solve for x
    x = 729.32/23.75
  6. Step 6: Final answer
    x = 30.71

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.