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Finding the Fourth Proportional to 22.82, 31.31 and 21.96

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Solution

The fourth proportional to 22.82, 31.31 and 21.96 is: 30.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.82 : 31.31 = 21.96 : x
  2. Step 2: Convert to fraction form
    22.82/31.31 = 21.96/x
  3. Step 3: Cross multiply
    22.82x = 31.31 × 21.96
  4. Step 4: Simplify right side
    22.82x = 687.54
  5. Step 5: Solve for x
    x = 687.54/22.82
  6. Step 6: Final answer
    x = 30.14

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.