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Finding the Third Proportional to 12,129.75 and 18,734.63

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Solution

The third proportional to 12,129.75 and 18,734.63 is: 28,935.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,129.75 : 18,734.63 = 18,734.63 : x
  2. Step 2: Convert to fraction form
    12,129.75/18,734.63 = 18,734.63/x
  3. Step 3: Cross multiply
    12,129.75x = 18,734.63 × 18,734.63
  4. Step 4: Simplify right side
    12,129.75x = 350,986,173.89
  5. Step 5: Solve for x
    x = 350,986,173.89/12,129.75
  6. Step 6: Final answer
    x = 28,935.98

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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.