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Finding the Third Proportional to 4,712 and 9,909

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Solution

The third proportional to 4,712 and 9,909 is: 20,837.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,712 : 9,909 = 9,909 : x
  2. Step 2: Convert to fraction form
    4,712/9,909 = 9,909/x
  3. Step 3: Cross multiply
    4,712x = 9,909 × 9,909
  4. Step 4: Simplify right side
    4,712x = 98,188,281
  5. Step 5: Solve for x
    x = 98,188,281/4,712
  6. Step 6: Final answer
    x = 20,837.92

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.