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Finding the Fourth Proportional to 10.34, 15.49 and 7.94

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Solution

The fourth proportional to 10.34, 15.49 and 7.94 is: 11.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.34 : 15.49 = 7.94 : x
  2. Step 2: Convert to fraction form
    10.34/15.49 = 7.94/x
  3. Step 3: Cross multiply
    10.34x = 15.49 × 7.94
  4. Step 4: Simplify right side
    10.34x = 122.87
  5. Step 5: Solve for x
    x = 122.87/10.34
  6. Step 6: Final answer
    x = 11.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.