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Finding the Fourth Proportional to 8, 12.04 and 7.68

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Solution

The fourth proportional to 8, 12.04 and 7.68 is: 11.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8 : 12.04 = 7.68 : x
  2. Step 2: Convert to fraction form
    8/12.04 = 7.68/x
  3. Step 3: Cross multiply
    8x = 12.04 × 7.68
  4. Step 4: Simplify right side
    8x = 92.47
  5. Step 5: Solve for x
    x = 92.47/8
  6. Step 6: Final answer
    x = 11.56

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1.5x scale

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.