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Finding the Third Proportional to 12,782 and 19,578

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Solution

The third proportional to 12,782 and 19,578 is: 29,987.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,782 : 19,578 = 19,578 : x
  2. Step 2: Convert to fraction form
    12,782/19,578 = 19,578/x
  3. Step 3: Cross multiply
    12,782x = 19,578 × 19,578
  4. Step 4: Simplify right side
    12,782x = 383,298,084
  5. Step 5: Solve for x
    x = 383,298,084/12,782
  6. Step 6: Final answer
    x = 29,987.33

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.