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Finding the Fourth Proportional to 25.51, 38.23 and 19.12

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Solution

The fourth proportional to 25.51, 38.23 and 19.12 is: 28.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.51 : 38.23 = 19.12 : x
  2. Step 2: Convert to fraction form
    25.51/38.23 = 19.12/x
  3. Step 3: Cross multiply
    25.51x = 38.23 × 19.12
  4. Step 4: Simplify right side
    25.51x = 730.96
  5. Step 5: Solve for x
    x = 730.96/25.51
  6. Step 6: Final answer
    x = 28.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.