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Finding the Third Proportional to 20,056.50 and 21,879

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Solution

The third proportional to 20,056.50 and 21,879 is: 23,867.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,056.50 : 21,879 = 21,879 : x
  2. Step 2: Convert to fraction form
    20,056.50/21,879 = 21,879/x
  3. Step 3: Cross multiply
    20,056.50x = 21,879 × 21,879
  4. Step 4: Simplify right side
    20,056.50x = 478,690,641
  5. Step 5: Solve for x
    x = 478,690,641/20,056.50
  6. Step 6: Final answer
    x = 23,867.11

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.