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Finding the Third Proportional to 20,947.50 and 45,531

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Solution

The third proportional to 20,947.50 and 45,531 is: 98,965.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,947.50 : 45,531 = 45,531 : x
  2. Step 2: Convert to fraction form
    20,947.50/45,531 = 45,531/x
  3. Step 3: Cross multiply
    20,947.50x = 45,531 × 45,531
  4. Step 4: Simplify right side
    20,947.50x = 2,073,071,961
  5. Step 5: Solve for x
    x = 2,073,071,961/20,947.50
  6. Step 6: Final answer
    x = 98,965.13

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.