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Finding the Third Proportional to 13,128.19 and 20,879.44

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Solution

The third proportional to 13,128.19 and 20,879.44 is: 33,207.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.19 : 20,879.44 = 20,879.44 : x
  2. Step 2: Convert to fraction form
    13,128.19/20,879.44 = 20,879.44/x
  3. Step 3: Cross multiply
    13,128.19x = 20,879.44 × 20,879.44
  4. Step 4: Simplify right side
    13,128.19x = 435,950,910.32
  5. Step 5: Solve for x
    x = 435,950,910.32/13,128.19
  6. Step 6: Final answer
    x = 33,207.24

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.