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Finding the Fourth Proportional to 22.28, 33.24 and 21.65

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Solution

The fourth proportional to 22.28, 33.24 and 21.65 is: 32.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.28 : 33.24 = 21.65 : x
  2. Step 2: Convert to fraction form
    22.28/33.24 = 21.65/x
  3. Step 3: Cross multiply
    22.28x = 33.24 × 21.65
  4. Step 4: Simplify right side
    22.28x = 719.48
  5. Step 5: Solve for x
    x = 719.48/22.28
  6. Step 6: Final answer
    x = 32.30

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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.