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Finding the Third Proportional to 12,190 and 19,386

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Solution

The third proportional to 12,190 and 19,386 is: 30,829.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,190 : 19,386 = 19,386 : x
  2. Step 2: Convert to fraction form
    12,190/19,386 = 19,386/x
  3. Step 3: Cross multiply
    12,190x = 19,386 × 19,386
  4. Step 4: Simplify right side
    12,190x = 375,816,996
  5. Step 5: Solve for x
    x = 375,816,996/12,190
  6. Step 6: Final answer
    x = 30,829.94

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.