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Finding the Third Proportional to 12,621 and 19,755

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Solution

The third proportional to 12,621 and 19,755 is: 30,921.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,621 : 19,755 = 19,755 : x
  2. Step 2: Convert to fraction form
    12,621/19,755 = 19,755/x
  3. Step 3: Cross multiply
    12,621x = 19,755 × 19,755
  4. Step 4: Simplify right side
    12,621x = 390,260,025
  5. Step 5: Solve for x
    x = 390,260,025/12,621
  6. Step 6: Final answer
    x = 30,921.48

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.