Home / 5,181.89-7,772.56-1,286.06

Finding the Fourth Proportional to 5,181.89, 7,772.56 and 1,286.06

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Solution

The fourth proportional to 5,181.89, 7,772.56 and 1,286.06 is: 1,929.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,181.89 : 7,772.56 = 1,286.06 : x
  2. Step 2: Convert to fraction form
    5,181.89/7,772.56 = 1,286.06/x
  3. Step 3: Cross multiply
    5,181.89x = 7,772.56 × 1,286.06
  4. Step 4: Simplify right side
    5,181.89x = 9,995,936.44
  5. Step 5: Solve for x
    x = 9,995,936.44/5,181.89
  6. Step 6: Final answer
    x = 1,929.02

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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.