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Finding the Fourth Proportional to 22.85, 34.11 and 21.33

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Solution

The fourth proportional to 22.85, 34.11 and 21.33 is: 31.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.85 : 34.11 = 21.33 : x
  2. Step 2: Convert to fraction form
    22.85/34.11 = 21.33/x
  3. Step 3: Cross multiply
    22.85x = 34.11 × 21.33
  4. Step 4: Simplify right side
    22.85x = 727.51
  5. Step 5: Solve for x
    x = 727.51/22.85
  6. Step 6: Final answer
    x = 31.84

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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.