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Finding the Third Proportional to 20,810 and 27,890

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Solution

The third proportional to 20,810 and 27,890 is: 37,378.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,810 : 27,890 = 27,890 : x
  2. Step 2: Convert to fraction form
    20,810/27,890 = 27,890/x
  3. Step 3: Cross multiply
    20,810x = 27,890 × 27,890
  4. Step 4: Simplify right side
    20,810x = 777,852,100
  5. Step 5: Solve for x
    x = 777,852,100/20,810
  6. Step 6: Final answer
    x = 37,378.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.