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Finding the Third Proportional to 13,140 and 18,738

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Solution

The third proportional to 13,140 and 18,738 is: 26,720.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140 : 18,738 = 18,738 : x
  2. Step 2: Convert to fraction form
    13,140/18,738 = 18,738/x
  3. Step 3: Cross multiply
    13,140x = 18,738 × 18,738
  4. Step 4: Simplify right side
    13,140x = 351,112,644
  5. Step 5: Solve for x
    x = 351,112,644/13,140
  6. Step 6: Final answer
    x = 26,720.90

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.