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Finding the Third Proportional to 12,143.25 and 18,748.13

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Solution

The third proportional to 12,143.25 and 18,748.13 is: 28,945.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,143.25 : 18,748.13 = 18,748.13 : x
  2. Step 2: Convert to fraction form
    12,143.25/18,748.13 = 18,748.13/x
  3. Step 3: Cross multiply
    12,143.25x = 18,748.13 × 18,748.13
  4. Step 4: Simplify right side
    12,143.25x = 351,492,191.02
  5. Step 5: Solve for x
    x = 351,492,191.02/12,143.25
  6. Step 6: Final answer
    x = 28,945.48

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.