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Finding the Third Proportional to 5,489 and 8,280.50

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Solution

The third proportional to 5,489 and 8,280.50 is: 12,491.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,489 : 8,280.50 = 8,280.50 : x
  2. Step 2: Convert to fraction form
    5,489/8,280.50 = 8,280.50/x
  3. Step 3: Cross multiply
    5,489x = 8,280.50 × 8,280.50
  4. Step 4: Simplify right side
    5,489x = 68,566,680.25
  5. Step 5: Solve for x
    x = 68,566,680.25/5,489
  6. Step 6: Final answer
    x = 12,491.65

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.