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Finding the Third Proportional to 3,280.50 and 7,047

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Solution

The third proportional to 3,280.50 and 7,047 is: 15,138

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,280.50 : 7,047 = 7,047 : x
  2. Step 2: Convert to fraction form
    3,280.50/7,047 = 7,047/x
  3. Step 3: Cross multiply
    3,280.50x = 7,047 × 7,047
  4. Step 4: Simplify right side
    3,280.50x = 49,660,209
  5. Step 5: Solve for x
    x = 49,660,209/3,280.50
  6. Step 6: Final answer
    x = 15,138

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.