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Finding the Third Proportional to 15,591 and 20,106

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Solution

The third proportional to 15,591 and 20,106 is: 25,928.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,591 : 20,106 = 20,106 : x
  2. Step 2: Convert to fraction form
    15,591/20,106 = 20,106/x
  3. Step 3: Cross multiply
    15,591x = 20,106 × 20,106
  4. Step 4: Simplify right side
    15,591x = 404,251,236
  5. Step 5: Solve for x
    x = 404,251,236/15,591
  6. Step 6: Final answer
    x = 25,928.50

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Why These Related Problems?

These problems maintain the same ratio (1.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.