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Finding the Third Proportional to 20,511.75 and 28,260.75

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Solution

The third proportional to 20,511.75 and 28,260.75 is: 38,937.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.75 : 28,260.75 = 28,260.75 : x
  2. Step 2: Convert to fraction form
    20,511.75/28,260.75 = 28,260.75/x
  3. Step 3: Cross multiply
    20,511.75x = 28,260.75 × 28,260.75
  4. Step 4: Simplify right side
    20,511.75x = 798,669,990.56
  5. Step 5: Solve for x
    x = 798,669,990.56/20,511.75
  6. Step 6: Final answer
    x = 38,937.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.