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Finding the Third Proportional to 8,638,621 and 18,904,370

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Solution

The third proportional to 8,638,621 and 18,904,370 is: 41,369,473.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,638,621 : 18,904,370 = 18,904,370 : x
  2. Step 2: Convert to fraction form
    8,638,621/18,904,370 = 18,904,370/x
  3. Step 3: Cross multiply
    8,638,621x = 18,904,370 × 18,904,370
  4. Step 4: Simplify right side
    8,638,621x = 357,375,205,096,900
  5. Step 5: Solve for x
    x = 357,375,205,096,900/8,638,621
  6. Step 6: Final answer
    x = 41,369,473.80

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.