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Finding the Third Proportional to 8,638.88 and 13,208.63

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Solution

The third proportional to 8,638.88 and 13,208.63 is: 20,195.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,638.88 : 13,208.63 = 13,208.63 : x
  2. Step 2: Convert to fraction form
    8,638.88/13,208.63 = 13,208.63/x
  3. Step 3: Cross multiply
    8,638.88x = 13,208.63 × 13,208.63
  4. Step 4: Simplify right side
    8,638.88x = 174,467,774.39
  5. Step 5: Solve for x
    x = 174,467,774.39/8,638.88
  6. Step 6: Final answer
    x = 20,195.66

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.