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Finding the Fourth Proportional to 28.95, 39.94 and 19.73

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Solution

The fourth proportional to 28.95, 39.94 and 19.73 is: 27.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28.95 : 39.94 = 19.73 : x
  2. Step 2: Convert to fraction form
    28.95/39.94 = 19.73/x
  3. Step 3: Cross multiply
    28.95x = 39.94 × 19.73
  4. Step 4: Simplify right side
    28.95x = 787.95
  5. Step 5: Solve for x
    x = 787.95/28.95
  6. Step 6: Final answer
    x = 27.22

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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.