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Finding the Third Proportional to 20,407 and 28,886

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Solution

The third proportional to 20,407 and 28,886 is: 40,887.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,407 : 28,886 = 28,886 : x
  2. Step 2: Convert to fraction form
    20,407/28,886 = 28,886/x
  3. Step 3: Cross multiply
    20,407x = 28,886 × 28,886
  4. Step 4: Simplify right side
    20,407x = 834,400,996
  5. Step 5: Solve for x
    x = 834,400,996/20,407
  6. Step 6: Final answer
    x = 40,887.98

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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.