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Finding the Fourth Proportional to 8, 11.02 and 6.84

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Solution

The fourth proportional to 8, 11.02 and 6.84 is: 9.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8 : 11.02 = 6.84 : x
  2. Step 2: Convert to fraction form
    8/11.02 = 6.84/x
  3. Step 3: Cross multiply
    8x = 11.02 × 6.84
  4. Step 4: Simplify right side
    8x = 75.38
  5. Step 5: Solve for x
    x = 75.38/8
  6. Step 6: Final answer
    x = 9.42

Related Problems

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.