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Finding the Fourth Proportional to 25.75, 35.52 and 15.38

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Solution

The fourth proportional to 25.75, 35.52 and 15.38 is: 21.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.75 : 35.52 = 15.38 : x
  2. Step 2: Convert to fraction form
    25.75/35.52 = 15.38/x
  3. Step 3: Cross multiply
    25.75x = 35.52 × 15.38
  4. Step 4: Simplify right side
    25.75x = 546.33
  5. Step 5: Solve for x
    x = 546.33/25.75
  6. Step 6: Final answer
    x = 21.22

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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.