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Finding the Fourth Proportional to 39.25, 54.14 and 25.43

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Solution

The fourth proportional to 39.25, 54.14 and 25.43 is: 35.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.25 : 54.14 = 25.43 : x
  2. Step 2: Convert to fraction form
    39.25/54.14 = 25.43/x
  3. Step 3: Cross multiply
    39.25x = 54.14 × 25.43
  4. Step 4: Simplify right side
    39.25x = 1,376.69
  5. Step 5: Solve for x
    x = 1,376.69/39.25
  6. Step 6: Final answer
    x = 35.07

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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.