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Finding the Third Proportional to 12,980.75 and 28,239.75

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Solution

The third proportional to 12,980.75 and 28,239.75 is: 61,435.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,980.75 : 28,239.75 = 28,239.75 : x
  2. Step 2: Convert to fraction form
    12,980.75/28,239.75 = 28,239.75/x
  3. Step 3: Cross multiply
    12,980.75x = 28,239.75 × 28,239.75
  4. Step 4: Simplify right side
    12,980.75x = 797,483,480.06
  5. Step 5: Solve for x
    x = 797,483,480.06/12,980.75
  6. Step 6: Final answer
    x = 61,435.86

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.