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Finding the Third Proportional to 9,147.12 and 13,720.68

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Solution

The third proportional to 9,147.12 and 13,720.68 is: 20,581.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,147.12 : 13,720.68 = 13,720.68 : x
  2. Step 2: Convert to fraction form
    9,147.12/13,720.68 = 13,720.68/x
  3. Step 3: Cross multiply
    9,147.12x = 13,720.68 × 13,720.68
  4. Step 4: Simplify right side
    9,147.12x = 188,256,928.82
  5. Step 5: Solve for x
    x = 188,256,928.82/9,147.12
  6. Step 6: Final answer
    x = 20,581.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.