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Finding the Fourth Proportional to 22.68, 33.89 and 20.28

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Solution

The fourth proportional to 22.68, 33.89 and 20.28 is: 30.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.68 : 33.89 = 20.28 : x
  2. Step 2: Convert to fraction form
    22.68/33.89 = 20.28/x
  3. Step 3: Cross multiply
    22.68x = 33.89 × 20.28
  4. Step 4: Simplify right side
    22.68x = 687.29
  5. Step 5: Solve for x
    x = 687.29/22.68
  6. Step 6: Final answer
    x = 30.30

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.