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Finding the Fourth Proportional to 23.12, 34.42 and 21.74

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Solution

The fourth proportional to 23.12, 34.42 and 21.74 is: 32.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    23.12 : 34.42 = 21.74 : x
  2. Step 2: Convert to fraction form
    23.12/34.42 = 21.74/x
  3. Step 3: Cross multiply
    23.12x = 34.42 × 21.74
  4. Step 4: Simplify right side
    23.12x = 748.29
  5. Step 5: Solve for x
    x = 748.29/23.12
  6. Step 6: Final answer
    x = 32.37

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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.