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Finding the Third Proportional to 13,515 and 31,566

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Solution

The third proportional to 13,515 and 31,566 is: 73,726.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,515 : 31,566 = 31,566 : x
  2. Step 2: Convert to fraction form
    13,515/31,566 = 31,566/x
  3. Step 3: Cross multiply
    13,515x = 31,566 × 31,566
  4. Step 4: Simplify right side
    13,515x = 996,412,356
  5. Step 5: Solve for x
    x = 996,412,356/13,515
  6. Step 6: Final answer
    x = 73,726.40

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Why These Related Problems?

These problems maintain the same ratio (2.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.