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Finding the Third Proportional to 15,724 and 34,219

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Solution

The third proportional to 15,724 and 34,219 is: 74,468.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,724 : 34,219 = 34,219 : x
  2. Step 2: Convert to fraction form
    15,724/34,219 = 34,219/x
  3. Step 3: Cross multiply
    15,724x = 34,219 × 34,219
  4. Step 4: Simplify right side
    15,724x = 1,170,939,961
  5. Step 5: Solve for x
    x = 1,170,939,961/15,724
  6. Step 6: Final answer
    x = 74,468.33

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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.