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Finding the Fourth Proportional to 22, 32.96 and 11.87

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Solution

The fourth proportional to 22, 32.96 and 11.87 is: 17.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    22 : 32.96 = 11.87 : x
  2. Step 2: Convert to fraction form
    22/32.96 = 11.87/x
  3. Step 3: Cross multiply
    22x = 32.96 × 11.87
  4. Step 4: Simplify right side
    22x = 391.24
  5. Step 5: Solve for x
    x = 391.24/22
  6. Step 6: Final answer
    x = 17.78

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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.