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Finding the Third Proportional to 7,828 and 17,878

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Solution

The third proportional to 7,828 and 17,878 is: 40,830.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,828 : 17,878 = 17,878 : x
  2. Step 2: Convert to fraction form
    7,828/17,878 = 17,878/x
  3. Step 3: Cross multiply
    7,828x = 17,878 × 17,878
  4. Step 4: Simplify right side
    7,828x = 319,622,884
  5. Step 5: Solve for x
    x = 319,622,884/7,828
  6. Step 6: Final answer
    x = 40,830.72

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Why These Related Problems?

These problems maintain the same ratio (2.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.