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Finding the Third Proportional to 3,945,684.66 and 8,478,783

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Solution

The third proportional to 3,945,684.66 and 8,478,783 is: 18,219,844.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945,684.66 : 8,478,783 = 8,478,783 : x
  2. Step 2: Convert to fraction form
    3,945,684.66/8,478,783 = 8,478,783/x
  3. Step 3: Cross multiply
    3,945,684.66x = 8,478,783 × 8,478,783
  4. Step 4: Simplify right side
    3,945,684.66x = 71,889,761,161,089
  5. Step 5: Solve for x
    x = 71,889,761,161,089/3,945,684.66
  6. Step 6: Final answer
    x = 18,219,844.57

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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.