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Finding the Third Proportional to 7,917.75 and 12,619.13

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Solution

The third proportional to 7,917.75 and 12,619.13 is: 20,112.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,917.75 : 12,619.13 = 12,619.13 : x
  2. Step 2: Convert to fraction form
    7,917.75/12,619.13 = 12,619.13/x
  3. Step 3: Cross multiply
    7,917.75x = 12,619.13 × 12,619.13
  4. Step 4: Simplify right side
    7,917.75x = 159,242,315.77
  5. Step 5: Solve for x
    x = 159,242,315.77/7,917.75
  6. Step 6: Final answer
    x = 20,112.07

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.