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Finding the Third Proportional to 4,490 and 9,940

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Solution

The third proportional to 4,490 and 9,940 is: 22,005.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,490 : 9,940 = 9,940 : x
  2. Step 2: Convert to fraction form
    4,490/9,940 = 9,940/x
  3. Step 3: Cross multiply
    4,490x = 9,940 × 9,940
  4. Step 4: Simplify right side
    4,490x = 98,803,600
  5. Step 5: Solve for x
    x = 98,803,600/4,490
  6. Step 6: Final answer
    x = 22,005.26

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.