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Finding the Third Proportional to 12,890 and 18,955

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Solution

The third proportional to 12,890 and 18,955 is: 27,873.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,890 : 18,955 = 18,955 : x
  2. Step 2: Convert to fraction form
    12,890/18,955 = 18,955/x
  3. Step 3: Cross multiply
    12,890x = 18,955 × 18,955
  4. Step 4: Simplify right side
    12,890x = 359,292,025
  5. Step 5: Solve for x
    x = 359,292,025/12,890
  6. Step 6: Final answer
    x = 27,873.70

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.