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Finding the Fourth Proportional to 23.31, 31.73 and 23.18

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Solution

The fourth proportional to 23.31, 31.73 and 23.18 is: 31.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    23.31 : 31.73 = 23.18 : x
  2. Step 2: Convert to fraction form
    23.31/31.73 = 23.18/x
  3. Step 3: Cross multiply
    23.31x = 31.73 × 23.18
  4. Step 4: Simplify right side
    23.31x = 735.23
  5. Step 5: Solve for x
    x = 735.23/23.31
  6. Step 6: Final answer
    x = 31.54

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.