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Finding the Fourth Proportional to 39.25, 54.12 and 27.57

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Solution

The fourth proportional to 39.25, 54.12 and 27.57 is: 38.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.25 : 54.12 = 27.57 : x
  2. Step 2: Convert to fraction form
    39.25/54.12 = 27.57/x
  3. Step 3: Cross multiply
    39.25x = 54.12 × 27.57
  4. Step 4: Simplify right side
    39.25x = 1,492.09
  5. Step 5: Solve for x
    x = 1,492.09/39.25
  6. Step 6: Final answer
    x = 38.01

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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.