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Finding the Fourth Proportional to 3,929.94, 5,921.94 and 3,251.87

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Solution

The fourth proportional to 3,929.94, 5,921.94 and 3,251.87 is: 4,900.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.94 : 5,921.94 = 3,251.87 : x
  2. Step 2: Convert to fraction form
    3,929.94/5,921.94 = 3,251.87/x
  3. Step 3: Cross multiply
    3,929.94x = 5,921.94 × 3,251.87
  4. Step 4: Simplify right side
    3,929.94x = 19,257,349.42
  5. Step 5: Solve for x
    x = 19,257,349.42/3,929.94
  6. Step 6: Final answer
    x = 4,900.16

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.