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Finding the Third Proportional to 9,121.50 and 13,748.25

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Solution

The third proportional to 9,121.50 and 13,748.25 is: 20,721.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,121.50 : 13,748.25 = 13,748.25 : x
  2. Step 2: Convert to fraction form
    9,121.50/13,748.25 = 13,748.25/x
  3. Step 3: Cross multiply
    9,121.50x = 13,748.25 × 13,748.25
  4. Step 4: Simplify right side
    9,121.50x = 189,014,378.06
  5. Step 5: Solve for x
    x = 189,014,378.06/9,121.50
  6. Step 6: Final answer
    x = 20,721.85

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.