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Finding the Fourth Proportional to 8.27, 12.40 and 5.60

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Solution

The fourth proportional to 8.27, 12.40 and 5.60 is: 8.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8.27 : 12.40 = 5.60 : x
  2. Step 2: Convert to fraction form
    8.27/12.40 = 5.60/x
  3. Step 3: Cross multiply
    8.27x = 12.40 × 5.60
  4. Step 4: Simplify right side
    8.27x = 69.38
  5. Step 5: Solve for x
    x = 69.38/8.27
  6. Step 6: Final answer
    x = 8.39

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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.