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Finding the Fourth Proportional to 22.17, 33.28 and 13.62

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Solution

The fourth proportional to 22.17, 33.28 and 13.62 is: 20.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.17 : 33.28 = 13.62 : x
  2. Step 2: Convert to fraction form
    22.17/33.28 = 13.62/x
  3. Step 3: Cross multiply
    22.17x = 33.28 × 13.62
  4. Step 4: Simplify right side
    22.17x = 453.27
  5. Step 5: Solve for x
    x = 453.27/22.17
  6. Step 6: Final answer
    x = 20.45

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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.