Home / 3,921.66-5,411.79-2,153.25

Finding the Fourth Proportional to 3,921.66, 5,411.79 and 2,153.25

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Solution

The fourth proportional to 3,921.66, 5,411.79 and 2,153.25 is: 2,971.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.66 : 5,411.79 = 2,153.25 : x
  2. Step 2: Convert to fraction form
    3,921.66/5,411.79 = 2,153.25/x
  3. Step 3: Cross multiply
    3,921.66x = 5,411.79 × 2,153.25
  4. Step 4: Simplify right side
    3,921.66x = 11,652,936.82
  5. Step 5: Solve for x
    x = 11,652,936.82/3,921.66
  6. Step 6: Final answer
    x = 2,971.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.