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Finding the Fourth Proportional to 38.22, 57.31 and 11.16

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Solution

The fourth proportional to 38.22, 57.31 and 11.16 is: 16.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.22 : 57.31 = 11.16 : x
  2. Step 2: Convert to fraction form
    38.22/57.31 = 11.16/x
  3. Step 3: Cross multiply
    38.22x = 57.31 × 11.16
  4. Step 4: Simplify right side
    38.22x = 639.24
  5. Step 5: Solve for x
    x = 639.24/38.22
  6. Step 6: Final answer
    x = 16.73

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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.