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Finding the Fourth Proportional to 3,936.51, 5,907.51 and 1,856.61

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Solution

The fourth proportional to 3,936.51, 5,907.51 and 1,856.61 is: 2,786.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,936.51 : 5,907.51 = 1,856.61 : x
  2. Step 2: Convert to fraction form
    3,936.51/5,907.51 = 1,856.61/x
  3. Step 3: Cross multiply
    3,936.51x = 5,907.51 × 1,856.61
  4. Step 4: Simplify right side
    3,936.51x = 10,967,942.14
  5. Step 5: Solve for x
    x = 10,967,942.14/3,936.51
  6. Step 6: Final answer
    x = 2,786.21

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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.