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Finding the Third Proportional to 11,985 and 18,397.50

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Solution

The third proportional to 11,985 and 18,397.50 is: 28,240.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,985 : 18,397.50 = 18,397.50 : x
  2. Step 2: Convert to fraction form
    11,985/18,397.50 = 18,397.50/x
  3. Step 3: Cross multiply
    11,985x = 18,397.50 × 18,397.50
  4. Step 4: Simplify right side
    11,985x = 338,468,006.25
  5. Step 5: Solve for x
    x = 338,468,006.25/11,985
  6. Step 6: Final answer
    x = 28,240.97

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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.