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Finding the Third Proportional to 4,969 and 7,939.50

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Solution

The third proportional to 4,969 and 7,939.50 is: 12,685.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,969 : 7,939.50 = 7,939.50 : x
  2. Step 2: Convert to fraction form
    4,969/7,939.50 = 7,939.50/x
  3. Step 3: Cross multiply
    4,969x = 7,939.50 × 7,939.50
  4. Step 4: Simplify right side
    4,969x = 63,035,660.25
  5. Step 5: Solve for x
    x = 63,035,660.25/4,969
  6. Step 6: Final answer
    x = 12,685.78

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These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.