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Finding the Fourth Proportional to 38.73, 53.47 and 27.83

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Solution

The fourth proportional to 38.73, 53.47 and 27.83 is: 38.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.73 : 53.47 = 27.83 : x
  2. Step 2: Convert to fraction form
    38.73/53.47 = 27.83/x
  3. Step 3: Cross multiply
    38.73x = 53.47 × 27.83
  4. Step 4: Simplify right side
    38.73x = 1,488.07
  5. Step 5: Solve for x
    x = 1,488.07/38.73
  6. Step 6: Final answer
    x = 38.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.