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Finding the Third Proportional to 3,415.50 and 7,143

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Solution

The third proportional to 3,415.50 and 7,143 is: 14,938.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,415.50 : 7,143 = 7,143 : x
  2. Step 2: Convert to fraction form
    3,415.50/7,143 = 7,143/x
  3. Step 3: Cross multiply
    3,415.50x = 7,143 × 7,143
  4. Step 4: Simplify right side
    3,415.50x = 51,022,449
  5. Step 5: Solve for x
    x = 51,022,449/3,415.50
  6. Step 6: Final answer
    x = 14,938.50

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Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.