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Finding the Third Proportional to 4,905 and 9,972

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Solution

The third proportional to 4,905 and 9,972 is: 20,273.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,905 : 9,972 = 9,972 : x
  2. Step 2: Convert to fraction form
    4,905/9,972 = 9,972/x
  3. Step 3: Cross multiply
    4,905x = 9,972 × 9,972
  4. Step 4: Simplify right side
    4,905x = 99,440,784
  5. Step 5: Solve for x
    x = 99,440,784/4,905
  6. Step 6: Final answer
    x = 20,273.35

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.