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Finding the Third Proportional to 7,122 and 15,459

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Solution

The third proportional to 7,122 and 15,459 is: 33,555.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,122 : 15,459 = 15,459 : x
  2. Step 2: Convert to fraction form
    7,122/15,459 = 15,459/x
  3. Step 3: Cross multiply
    7,122x = 15,459 × 15,459
  4. Step 4: Simplify right side
    7,122x = 238,980,681
  5. Step 5: Solve for x
    x = 238,980,681/7,122
  6. Step 6: Final answer
    x = 33,555.28

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.