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Finding the Fourth Proportional to 9.08, 12.48 and 7.84

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Solution

The fourth proportional to 9.08, 12.48 and 7.84 is: 10.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    9.08 : 12.48 = 7.84 : x
  2. Step 2: Convert to fraction form
    9.08/12.48 = 7.84/x
  3. Step 3: Cross multiply
    9.08x = 12.48 × 7.84
  4. Step 4: Simplify right side
    9.08x = 97.84
  5. Step 5: Solve for x
    x = 97.84/9.08
  6. Step 6: Final answer
    x = 10.78

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.