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Finding the Third Proportional to 3,945,390.19 and 8,490,018.38

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Solution

The third proportional to 3,945,390.19 and 8,490,018.38 is: 18,269,526.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945,390.19 : 8,490,018.38 = 8,490,018.38 : x
  2. Step 2: Convert to fraction form
    3,945,390.19/8,490,018.38 = 8,490,018.38/x
  3. Step 3: Cross multiply
    3,945,390.19x = 8,490,018.38 × 8,490,018.38
  4. Step 4: Simplify right side
    3,945,390.19x = 72,080,412,007,837.64
  5. Step 5: Solve for x
    x = 72,080,412,007,837.64/3,945,390.19
  6. Step 6: Final answer
    x = 18,269,526.86

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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.