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Finding the Fourth Proportional to 39.15, 54.04 and 25.33

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Solution

The fourth proportional to 39.15, 54.04 and 25.33 is: 34.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.15 : 54.04 = 25.33 : x
  2. Step 2: Convert to fraction form
    39.15/54.04 = 25.33/x
  3. Step 3: Cross multiply
    39.15x = 54.04 × 25.33
  4. Step 4: Simplify right side
    39.15x = 1,368.83
  5. Step 5: Solve for x
    x = 1,368.83/39.15
  6. Step 6: Final answer
    x = 34.96

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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.