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Finding the Fourth Proportional to 8.45, 12.74 and 7.99

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Solution

The fourth proportional to 8.45, 12.74 and 7.99 is: 12.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8.45 : 12.74 = 7.99 : x
  2. Step 2: Convert to fraction form
    8.45/12.74 = 7.99/x
  3. Step 3: Cross multiply
    8.45x = 12.74 × 7.99
  4. Step 4: Simplify right side
    8.45x = 101.70
  5. Step 5: Solve for x
    x = 101.70/8.45
  6. Step 6: Final answer
    x = 12.04

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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.