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Finding the Third Proportional to 5,420.25 and 8,319.75

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Solution

The third proportional to 5,420.25 and 8,319.75 is: 12,770.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.25 : 8,319.75 = 8,319.75 : x
  2. Step 2: Convert to fraction form
    5,420.25/8,319.75 = 8,319.75/x
  3. Step 3: Cross multiply
    5,420.25x = 8,319.75 × 8,319.75
  4. Step 4: Simplify right side
    5,420.25x = 69,218,240.06
  5. Step 5: Solve for x
    x = 69,218,240.06/5,420.25
  6. Step 6: Final answer
    x = 12,770.30

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.