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Finding the Fourth Proportional to 22.47, 33.44 and 21.39

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Solution

The fourth proportional to 22.47, 33.44 and 21.39 is: 31.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.47 : 33.44 = 21.39 : x
  2. Step 2: Convert to fraction form
    22.47/33.44 = 21.39/x
  3. Step 3: Cross multiply
    22.47x = 33.44 × 21.39
  4. Step 4: Simplify right side
    22.47x = 715.28
  5. Step 5: Solve for x
    x = 715.28/22.47
  6. Step 6: Final answer
    x = 31.83

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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.