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Finding the Third Proportional to 3,415.50 and 7,143.19

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Solution

The third proportional to 3,415.50 and 7,143.19 is: 14,939.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,415.50 : 7,143.19 = 7,143.19 : x
  2. Step 2: Convert to fraction form
    3,415.50/7,143.19 = 7,143.19/x
  3. Step 3: Cross multiply
    3,415.50x = 7,143.19 × 7,143.19
  4. Step 4: Simplify right side
    3,415.50x = 51,025,127.66
  5. Step 5: Solve for x
    x = 51,025,127.66/3,415.50
  6. Step 6: Final answer
    x = 14,939.28

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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.