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Finding the Third Proportional to 20,921 and 45,989

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Solution

The third proportional to 20,921 and 45,989 is: 101,094.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,921 : 45,989 = 45,989 : x
  2. Step 2: Convert to fraction form
    20,921/45,989 = 45,989/x
  3. Step 3: Cross multiply
    20,921x = 45,989 × 45,989
  4. Step 4: Simplify right side
    20,921x = 2,114,988,121
  5. Step 5: Solve for x
    x = 2,114,988,121/20,921
  6. Step 6: Final answer
    x = 101,094.03

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.