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Finding the Third Proportional to 20,155 and 28,657

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Solution

The third proportional to 20,155 and 28,657 is: 40,745.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,155 : 28,657 = 28,657 : x
  2. Step 2: Convert to fraction form
    20,155/28,657 = 28,657/x
  3. Step 3: Cross multiply
    20,155x = 28,657 × 28,657
  4. Step 4: Simplify right side
    20,155x = 821,223,649
  5. Step 5: Solve for x
    x = 821,223,649/20,155
  6. Step 6: Final answer
    x = 40,745.41

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.