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Finding the Third Proportional to 8,639,142 and 18,905,412

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Solution

The third proportional to 8,639,142 and 18,905,412 is: 41,371,539.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639,142 : 18,905,412 = 18,905,412 : x
  2. Step 2: Convert to fraction form
    8,639,142/18,905,412 = 18,905,412/x
  3. Step 3: Cross multiply
    8,639,142x = 18,905,412 × 18,905,412
  4. Step 4: Simplify right side
    8,639,142x = 357,414,602,889,744
  5. Step 5: Solve for x
    x = 357,414,602,889,744/8,639,142
  6. Step 6: Final answer
    x = 41,371,539.31

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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.