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Finding the Fourth Proportional to 25.97, 38.79 and 25.47

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Solution

The fourth proportional to 25.97, 38.79 and 25.47 is: 38.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.97 : 38.79 = 25.47 : x
  2. Step 2: Convert to fraction form
    25.97/38.79 = 25.47/x
  3. Step 3: Cross multiply
    25.97x = 38.79 × 25.47
  4. Step 4: Simplify right side
    25.97x = 987.98
  5. Step 5: Solve for x
    x = 987.98/25.97
  6. Step 6: Final answer
    x = 38.05

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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.