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Finding the Third Proportional to 7,122 and 15,538

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Solution

The third proportional to 7,122 and 15,538 is: 33,899.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,122 : 15,538 = 15,538 : x
  2. Step 2: Convert to fraction form
    7,122/15,538 = 15,538/x
  3. Step 3: Cross multiply
    7,122x = 15,538 × 15,538
  4. Step 4: Simplify right side
    7,122x = 241,429,444
  5. Step 5: Solve for x
    x = 241,429,444/7,122
  6. Step 6: Final answer
    x = 33,899.11

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.