Home / 5,115.62-7,659.75-2,921.33

Finding the Fourth Proportional to 5,115.62, 7,659.75 and 2,921.33

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Solution

The fourth proportional to 5,115.62, 7,659.75 and 2,921.33 is: 4,374.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.62 : 7,659.75 = 2,921.33 : x
  2. Step 2: Convert to fraction form
    5,115.62/7,659.75 = 2,921.33/x
  3. Step 3: Cross multiply
    5,115.62x = 7,659.75 × 2,921.33
  4. Step 4: Simplify right side
    5,115.62x = 22,376,657.47
  5. Step 5: Solve for x
    x = 22,376,657.47/5,115.62
  6. Step 6: Final answer
    x = 4,374.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.