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Finding the Fourth Proportional to 8.05, 12 and 7.27

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Solution

The fourth proportional to 8.05, 12 and 7.27 is: 10.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8.05 : 12 = 7.27 : x
  2. Step 2: Convert to fraction form
    8.05/12 = 7.27/x
  3. Step 3: Cross multiply
    8.05x = 12 × 7.27
  4. Step 4: Simplify right side
    8.05x = 87.24
  5. Step 5: Solve for x
    x = 87.24/8.05
  6. Step 6: Final answer
    x = 10.84

Related Problems

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Double scale
Find fourth proportional to 9.05, 13.49 and 8.27
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.