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Finding the Fourth Proportional to 22.28, 33.56 and 19.68

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Solution

The fourth proportional to 22.28, 33.56 and 19.68 is: 29.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.28 : 33.56 = 19.68 : x
  2. Step 2: Convert to fraction form
    22.28/33.56 = 19.68/x
  3. Step 3: Cross multiply
    22.28x = 33.56 × 19.68
  4. Step 4: Simplify right side
    22.28x = 660.46
  5. Step 5: Solve for x
    x = 660.46/22.28
  6. Step 6: Final answer
    x = 29.64

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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.