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Finding the Third Proportional to 13,006 and 20,120

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Solution

The third proportional to 13,006 and 20,120 is: 31,125.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,006 : 20,120 = 20,120 : x
  2. Step 2: Convert to fraction form
    13,006/20,120 = 20,120/x
  3. Step 3: Cross multiply
    13,006x = 20,120 × 20,120
  4. Step 4: Simplify right side
    13,006x = 404,814,400
  5. Step 5: Solve for x
    x = 404,814,400/13,006
  6. Step 6: Final answer
    x = 31,125.20

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.