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Finding the Fourth Proportional to 25.07, 37.75 and 19.11

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Solution

The fourth proportional to 25.07, 37.75 and 19.11 is: 28.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.07 : 37.75 = 19.11 : x
  2. Step 2: Convert to fraction form
    25.07/37.75 = 19.11/x
  3. Step 3: Cross multiply
    25.07x = 37.75 × 19.11
  4. Step 4: Simplify right side
    25.07x = 721.40
  5. Step 5: Solve for x
    x = 721.40/25.07
  6. Step 6: Final answer
    x = 28.78

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.