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Finding the Fourth Proportional to 54.39, 81.62 and 18.33

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Solution

The fourth proportional to 54.39, 81.62 and 18.33 is: 27.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.39 : 81.62 = 18.33 : x
  2. Step 2: Convert to fraction form
    54.39/81.62 = 18.33/x
  3. Step 3: Cross multiply
    54.39x = 81.62 × 18.33
  4. Step 4: Simplify right side
    54.39x = 1,496.00
  5. Step 5: Solve for x
    x = 1,496.00/54.39
  6. Step 6: Final answer
    x = 27.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.