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Finding the Third Proportional to 20,432 and 28,136

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Solution

The third proportional to 20,432 and 28,136 is: 38,744.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,432 : 28,136 = 28,136 : x
  2. Step 2: Convert to fraction form
    20,432/28,136 = 28,136/x
  3. Step 3: Cross multiply
    20,432x = 28,136 × 28,136
  4. Step 4: Simplify right side
    20,432x = 791,634,496
  5. Step 5: Solve for x
    x = 791,634,496/20,432
  6. Step 6: Final answer
    x = 38,744.84

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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.