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Finding the Fourth Proportional to 12.71, 19.14 and 8.93

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Solution

The fourth proportional to 12.71, 19.14 and 8.93 is: 13.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12.71 : 19.14 = 8.93 : x
  2. Step 2: Convert to fraction form
    12.71/19.14 = 8.93/x
  3. Step 3: Cross multiply
    12.71x = 19.14 × 8.93
  4. Step 4: Simplify right side
    12.71x = 170.88
  5. Step 5: Solve for x
    x = 170.88/12.71
  6. Step 6: Final answer
    x = 13.44

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.