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Finding the Third Proportional to 28,443 and 39,786

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Solution

The third proportional to 28,443 and 39,786 is: 55,652.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,443 : 39,786 = 39,786 : x
  2. Step 2: Convert to fraction form
    28,443/39,786 = 39,786/x
  3. Step 3: Cross multiply
    28,443x = 39,786 × 39,786
  4. Step 4: Simplify right side
    28,443x = 1,582,925,796
  5. Step 5: Solve for x
    x = 1,582,925,796/28,443
  6. Step 6: Final answer
    x = 55,652.56

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.