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Finding the Third Proportional to 12,986 and 28,240

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Solution

The third proportional to 12,986 and 28,240 is: 61,412.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,986 : 28,240 = 28,240 : x
  2. Step 2: Convert to fraction form
    12,986/28,240 = 28,240/x
  3. Step 3: Cross multiply
    12,986x = 28,240 × 28,240
  4. Step 4: Simplify right side
    12,986x = 797,497,600
  5. Step 5: Solve for x
    x = 797,497,600/12,986
  6. Step 6: Final answer
    x = 61,412.11

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.