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Finding the Third Proportional to 6,615 and 15,561

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Solution

The third proportional to 6,615 and 15,561 is: 36,605.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,615 : 15,561 = 15,561 : x
  2. Step 2: Convert to fraction form
    6,615/15,561 = 15,561/x
  3. Step 3: Cross multiply
    6,615x = 15,561 × 15,561
  4. Step 4: Simplify right side
    6,615x = 242,144,721
  5. Step 5: Solve for x
    x = 242,144,721/6,615
  6. Step 6: Final answer
    x = 36,605.40

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Why These Related Problems?

These problems maintain the same ratio (2.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.