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Finding the Third Proportional to 8,678,390 and 18,662,811

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Solution

The third proportional to 8,678,390 and 18,662,811 is: 40,134,231.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,678,390 : 18,662,811 = 18,662,811 : x
  2. Step 2: Convert to fraction form
    8,678,390/18,662,811 = 18,662,811/x
  3. Step 3: Cross multiply
    8,678,390x = 18,662,811 × 18,662,811
  4. Step 4: Simplify right side
    8,678,390x = 348,300,514,421,721
  5. Step 5: Solve for x
    x = 348,300,514,421,721/8,678,390
  6. Step 6: Final answer
    x = 40,134,231.63

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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.