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Finding the Third Proportional to 8,420,387 and 18,256,844

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Solution

The third proportional to 8,420,387 and 18,256,844 is: 39,583,970.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420,387 : 18,256,844 = 18,256,844 : x
  2. Step 2: Convert to fraction form
    8,420,387/18,256,844 = 18,256,844/x
  3. Step 3: Cross multiply
    8,420,387x = 18,256,844 × 18,256,844
  4. Step 4: Simplify right side
    8,420,387x = 333,312,352,840,336
  5. Step 5: Solve for x
    x = 333,312,352,840,336/8,420,387
  6. Step 6: Final answer
    x = 39,583,970.77

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.