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Finding the Third Proportional to 21,990 and 48,460.50

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Solution

The third proportional to 21,990 and 48,460.50 is: 106,794.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,990 : 48,460.50 = 48,460.50 : x
  2. Step 2: Convert to fraction form
    21,990/48,460.50 = 48,460.50/x
  3. Step 3: Cross multiply
    21,990x = 48,460.50 × 48,460.50
  4. Step 4: Simplify right side
    21,990x = 2,348,420,060.25
  5. Step 5: Solve for x
    x = 2,348,420,060.25/21,990
  6. Step 6: Final answer
    x = 106,794.91

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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.