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Finding the Fourth Proportional to 22.07, 33.12 and 21.12

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Solution

The fourth proportional to 22.07, 33.12 and 21.12 is: 31.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.07 : 33.12 = 21.12 : x
  2. Step 2: Convert to fraction form
    22.07/33.12 = 21.12/x
  3. Step 3: Cross multiply
    22.07x = 33.12 × 21.12
  4. Step 4: Simplify right side
    22.07x = 699.49
  5. Step 5: Solve for x
    x = 699.49/22.07
  6. Step 6: Final answer
    x = 31.70

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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.