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Finding the Third Proportional to 12,400 and 18,786

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Solution

The third proportional to 12,400 and 18,786 is: 28,460.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,400 : 18,786 = 18,786 : x
  2. Step 2: Convert to fraction form
    12,400/18,786 = 18,786/x
  3. Step 3: Cross multiply
    12,400x = 18,786 × 18,786
  4. Step 4: Simplify right side
    12,400x = 352,913,796
  5. Step 5: Solve for x
    x = 352,913,796/12,400
  6. Step 6: Final answer
    x = 28,460.79

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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.