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Finding the Third Proportional to 15,417 and 31,928

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Solution

The third proportional to 15,417 and 31,928 is: 66,121.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,417 : 31,928 = 31,928 : x
  2. Step 2: Convert to fraction form
    15,417/31,928 = 31,928/x
  3. Step 3: Cross multiply
    15,417x = 31,928 × 31,928
  4. Step 4: Simplify right side
    15,417x = 1,019,397,184
  5. Step 5: Solve for x
    x = 1,019,397,184/15,417
  6. Step 6: Final answer
    x = 66,121.63

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.