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Finding the Fourth Proportional to 12.56, 18.77 and 8.24

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Solution

The fourth proportional to 12.56, 18.77 and 8.24 is: 12.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12.56 : 18.77 = 8.24 : x
  2. Step 2: Convert to fraction form
    12.56/18.77 = 8.24/x
  3. Step 3: Cross multiply
    12.56x = 18.77 × 8.24
  4. Step 4: Simplify right side
    12.56x = 154.53
  5. Step 5: Solve for x
    x = 154.53/12.56
  6. Step 6: Final answer
    x = 12.31

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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.