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Finding the Fourth Proportional to 38.67, 57.86 and 25.77

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Solution

The fourth proportional to 38.67, 57.86 and 25.77 is: 38.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.67 : 57.86 = 25.77 : x
  2. Step 2: Convert to fraction form
    38.67/57.86 = 25.77/x
  3. Step 3: Cross multiply
    38.67x = 57.86 × 25.77
  4. Step 4: Simplify right side
    38.67x = 1,491.05
  5. Step 5: Solve for x
    x = 1,491.05/38.67
  6. Step 6: Final answer
    x = 38.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.