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Finding the Third Proportional to 8,641,728 and 18,621,900

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Solution

The third proportional to 8,641,728 and 18,621,900 is: 40,127,988.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,641,728 : 18,621,900 = 18,621,900 : x
  2. Step 2: Convert to fraction form
    8,641,728/18,621,900 = 18,621,900/x
  3. Step 3: Cross multiply
    8,641,728x = 18,621,900 × 18,621,900
  4. Step 4: Simplify right side
    8,641,728x = 346,775,159,610,000
  5. Step 5: Solve for x
    x = 346,775,159,610,000/8,641,728
  6. Step 6: Final answer
    x = 40,127,988.25

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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.