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Finding the Fourth Proportional to 12.68, 17.48 and 9.74

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Solution

The fourth proportional to 12.68, 17.48 and 9.74 is: 13.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12.68 : 17.48 = 9.74 : x
  2. Step 2: Convert to fraction form
    12.68/17.48 = 9.74/x
  3. Step 3: Cross multiply
    12.68x = 17.48 × 9.74
  4. Step 4: Simplify right side
    12.68x = 170.12
  5. Step 5: Solve for x
    x = 170.12/12.68
  6. Step 6: Final answer
    x = 13.42

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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.