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Finding the Third Proportional to 1,931 and 4,125

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Solution

The third proportional to 1,931 and 4,125 is: 8,811.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,931 : 4,125 = 4,125 : x
  2. Step 2: Convert to fraction form
    1,931/4,125 = 4,125/x
  3. Step 3: Cross multiply
    1,931x = 4,125 × 4,125
  4. Step 4: Simplify right side
    1,931x = 17,015,625
  5. Step 5: Solve for x
    x = 17,015,625/1,931
  6. Step 6: Final answer
    x = 8,811.82

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.