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Finding the Third Proportional to 12.87 and 19.51

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Solution

The third proportional to 12.87 and 19.51 is: 29.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12.87 : 19.51 = 19.51 : x
  2. Step 2: Convert to fraction form
    12.87/19.51 = 19.51/x
  3. Step 3: Cross multiply
    12.87x = 19.51 × 19.51
  4. Step 4: Simplify right side
    12.87x = 380.71
  5. Step 5: Solve for x
    x = 380.71/12.87
  6. Step 6: Final answer
    x = 29.59

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.