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Finding the Third Proportional to 15,522 and 17,790

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Solution

The third proportional to 15,522 and 17,790 is: 20,389.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,522 : 17,790 = 17,790 : x
  2. Step 2: Convert to fraction form
    15,522/17,790 = 17,790/x
  3. Step 3: Cross multiply
    15,522x = 17,790 × 17,790
  4. Step 4: Simplify right side
    15,522x = 316,484,100
  5. Step 5: Solve for x
    x = 316,484,100/15,522
  6. Step 6: Final answer
    x = 20,389.39

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Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.