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Finding the Fourth Proportional to 14.38, 19.86 and 12.56

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Solution

The fourth proportional to 14.38, 19.86 and 12.56 is: 17.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.38 : 19.86 = 12.56 : x
  2. Step 2: Convert to fraction form
    14.38/19.86 = 12.56/x
  3. Step 3: Cross multiply
    14.38x = 19.86 × 12.56
  4. Step 4: Simplify right side
    14.38x = 249.44
  5. Step 5: Solve for x
    x = 249.44/14.38
  6. Step 6: Final answer
    x = 17.35

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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.