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Finding the Fourth Proportional to 19.49, 29.23 and 12.71

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Solution

The fourth proportional to 19.49, 29.23 and 12.71 is: 19.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.49 : 29.23 = 12.71 : x
  2. Step 2: Convert to fraction form
    19.49/29.23 = 12.71/x
  3. Step 3: Cross multiply
    19.49x = 29.23 × 12.71
  4. Step 4: Simplify right side
    19.49x = 371.39
  5. Step 5: Solve for x
    x = 371.39/19.49
  6. Step 6: Final answer
    x = 19.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.