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Finding the Third Proportional to 20,528 and 30,939

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Solution

The third proportional to 20,528 and 30,939 is: 46,630.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,528 : 30,939 = 30,939 : x
  2. Step 2: Convert to fraction form
    20,528/30,939 = 30,939/x
  3. Step 3: Cross multiply
    20,528x = 30,939 × 30,939
  4. Step 4: Simplify right side
    20,528x = 957,221,721
  5. Step 5: Solve for x
    x = 957,221,721/20,528
  6. Step 6: Final answer
    x = 46,630.05

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.