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Finding the Third Proportional to 13,138.13 and 20,398.13

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Solution

The third proportional to 13,138.13 and 20,398.13 is: 31,669.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.13 : 20,398.13 = 20,398.13 : x
  2. Step 2: Convert to fraction form
    13,138.13/20,398.13 = 20,398.13/x
  3. Step 3: Cross multiply
    13,138.13x = 20,398.13 × 20,398.13
  4. Step 4: Simplify right side
    13,138.13x = 416,083,503.52
  5. Step 5: Solve for x
    x = 416,083,503.52/13,138.13
  6. Step 6: Final answer
    x = 31,669.93

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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.