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Finding the Third Proportional to 13,515 and 20,079

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Solution

The third proportional to 13,515 and 20,079 is: 29,831.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,515 : 20,079 = 20,079 : x
  2. Step 2: Convert to fraction form
    13,515/20,079 = 20,079/x
  3. Step 3: Cross multiply
    13,515x = 20,079 × 20,079
  4. Step 4: Simplify right side
    13,515x = 403,166,241
  5. Step 5: Solve for x
    x = 403,166,241/13,515
  6. Step 6: Final answer
    x = 29,831.02

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.