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Finding the Fourth Proportional to 19.73, 27.10 and 17.78

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Solution

The fourth proportional to 19.73, 27.10 and 17.78 is: 24.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.73 : 27.10 = 17.78 : x
  2. Step 2: Convert to fraction form
    19.73/27.10 = 17.78/x
  3. Step 3: Cross multiply
    19.73x = 27.10 × 17.78
  4. Step 4: Simplify right side
    19.73x = 481.84
  5. Step 5: Solve for x
    x = 481.84/19.73
  6. Step 6: Final answer
    x = 24.42

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.