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Finding the Fourth Proportional to 21.82, 32.74 and 16.11

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Solution

The fourth proportional to 21.82, 32.74 and 16.11 is: 24.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21.82 : 32.74 = 16.11 : x
  2. Step 2: Convert to fraction form
    21.82/32.74 = 16.11/x
  3. Step 3: Cross multiply
    21.82x = 32.74 × 16.11
  4. Step 4: Simplify right side
    21.82x = 527.44
  5. Step 5: Solve for x
    x = 527.44/21.82
  6. Step 6: Final answer
    x = 24.17

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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.