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Finding the Third Proportional to 12,285 and 18,655.31

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Solution

The third proportional to 12,285 and 18,655.31 is: 28,328.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,285 : 18,655.31 = 18,655.31 : x
  2. Step 2: Convert to fraction form
    12,285/18,655.31 = 18,655.31/x
  3. Step 3: Cross multiply
    12,285x = 18,655.31 × 18,655.31
  4. Step 4: Simplify right side
    12,285x = 348,020,684.47
  5. Step 5: Solve for x
    x = 348,020,684.47/12,285
  6. Step 6: Final answer
    x = 28,328.91

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.