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Finding the Third Proportional to 15,966 and 20,121.75

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Solution

The third proportional to 15,966 and 20,121.75 is: 25,359.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,966 : 20,121.75 = 20,121.75 : x
  2. Step 2: Convert to fraction form
    15,966/20,121.75 = 20,121.75/x
  3. Step 3: Cross multiply
    15,966x = 20,121.75 × 20,121.75
  4. Step 4: Simplify right side
    15,966x = 404,884,823.06
  5. Step 5: Solve for x
    x = 404,884,823.06/15,966
  6. Step 6: Final answer
    x = 25,359.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.26) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.