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Finding the Fourth Proportional to 12.57, 17.31 and 10.95

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Solution

The fourth proportional to 12.57, 17.31 and 10.95 is: 15.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12.57 : 17.31 = 10.95 : x
  2. Step 2: Convert to fraction form
    12.57/17.31 = 10.95/x
  3. Step 3: Cross multiply
    12.57x = 17.31 × 10.95
  4. Step 4: Simplify right side
    12.57x = 189.54
  5. Step 5: Solve for x
    x = 189.54/12.57
  6. Step 6: Final answer
    x = 15.08

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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.