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Finding the Third Proportional to 3,189.38 and 5,111.54

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Solution

The third proportional to 3,189.38 and 5,111.54 is: 8,192.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,189.38 : 5,111.54 = 5,111.54 : x
  2. Step 2: Convert to fraction form
    3,189.38/5,111.54 = 5,111.54/x
  3. Step 3: Cross multiply
    3,189.38x = 5,111.54 × 5,111.54
  4. Step 4: Simplify right side
    3,189.38x = 26,127,871.52
  5. Step 5: Solve for x
    x = 26,127,871.52/3,189.38
  6. Step 6: Final answer
    x = 8,192.16

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.