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Finding the Third Proportional to 4,189,789.13 and 8,999,640

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Solution

The third proportional to 4,189,789.13 and 8,999,640 is: 19,331,168.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,189,789.13 : 8,999,640 = 8,999,640 : x
  2. Step 2: Convert to fraction form
    4,189,789.13/8,999,640 = 8,999,640/x
  3. Step 3: Cross multiply
    4,189,789.13x = 8,999,640 × 8,999,640
  4. Step 4: Simplify right side
    4,189,789.13x = 80,993,520,129,600
  5. Step 5: Solve for x
    x = 80,993,520,129,600/4,189,789.13
  6. Step 6: Final answer
    x = 19,331,168.64

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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.