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Finding the Third Proportional to 13,940 and 20,445

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Solution

The third proportional to 13,940 and 20,445 is: 29,985.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,940 : 20,445 = 20,445 : x
  2. Step 2: Convert to fraction form
    13,940/20,445 = 20,445/x
  3. Step 3: Cross multiply
    13,940x = 20,445 × 20,445
  4. Step 4: Simplify right side
    13,940x = 417,998,025
  5. Step 5: Solve for x
    x = 417,998,025/13,940
  6. Step 6: Final answer
    x = 29,985.51

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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.