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Finding the Third Proportional to 4,920.50 and 7,795

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Solution

The third proportional to 4,920.50 and 7,795 is: 12,348.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,920.50 : 7,795 = 7,795 : x
  2. Step 2: Convert to fraction form
    4,920.50/7,795 = 7,795/x
  3. Step 3: Cross multiply
    4,920.50x = 7,795 × 7,795
  4. Step 4: Simplify right side
    4,920.50x = 60,762,025
  5. Step 5: Solve for x
    x = 60,762,025/4,920.50
  6. Step 6: Final answer
    x = 12,348.75

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.