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Finding the Third Proportional to 20,790 and 28,224

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Solution

The third proportional to 20,790 and 28,224 is: 38,316.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790 : 28,224 = 28,224 : x
  2. Step 2: Convert to fraction form
    20,790/28,224 = 28,224/x
  3. Step 3: Cross multiply
    20,790x = 28,224 × 28,224
  4. Step 4: Simplify right side
    20,790x = 796,594,176
  5. Step 5: Solve for x
    x = 796,594,176/20,790
  6. Step 6: Final answer
    x = 38,316.22

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.