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Finding the Third Proportional to 18,702.25 and 27,989

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Solution

The third proportional to 18,702.25 and 27,989 is: 41,887.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,702.25 : 27,989 = 27,989 : x
  2. Step 2: Convert to fraction form
    18,702.25/27,989 = 27,989/x
  3. Step 3: Cross multiply
    18,702.25x = 27,989 × 27,989
  4. Step 4: Simplify right side
    18,702.25x = 783,384,121
  5. Step 5: Solve for x
    x = 783,384,121/18,702.25
  6. Step 6: Final answer
    x = 41,887.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.