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Finding the Fourth Proportional to 25.89, 38.84 and 8.77

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Solution

The fourth proportional to 25.89, 38.84 and 8.77 is: 13.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.89 : 38.84 = 8.77 : x
  2. Step 2: Convert to fraction form
    25.89/38.84 = 8.77/x
  3. Step 3: Cross multiply
    25.89x = 38.84 × 8.77
  4. Step 4: Simplify right side
    25.89x = 340.62
  5. Step 5: Solve for x
    x = 340.62/25.89
  6. Step 6: Final answer
    x = 13.16

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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.