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Finding the Third Proportional to 20,143 and 28,735

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Solution

The third proportional to 20,143 and 28,735 is: 40,991.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143 : 28,735 = 28,735 : x
  2. Step 2: Convert to fraction form
    20,143/28,735 = 28,735/x
  3. Step 3: Cross multiply
    20,143x = 28,735 × 28,735
  4. Step 4: Simplify right side
    20,143x = 825,700,225
  5. Step 5: Solve for x
    x = 825,700,225/20,143
  6. Step 6: Final answer
    x = 40,991.92

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.