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Finding the Fourth Proportional to 22.11, 33.36 and 21.66

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Solution

The fourth proportional to 22.11, 33.36 and 21.66 is: 32.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.11 : 33.36 = 21.66 : x
  2. Step 2: Convert to fraction form
    22.11/33.36 = 21.66/x
  3. Step 3: Cross multiply
    22.11x = 33.36 × 21.66
  4. Step 4: Simplify right side
    22.11x = 722.58
  5. Step 5: Solve for x
    x = 722.58/22.11
  6. Step 6: Final answer
    x = 32.68

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.