Home / 3,918.70-5,407.81-2,150.31

Finding the Fourth Proportional to 3,918.70, 5,407.81 and 2,150.31

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Solution

The fourth proportional to 3,918.70, 5,407.81 and 2,150.31 is: 2,967.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.70 : 5,407.81 = 2,150.31 : x
  2. Step 2: Convert to fraction form
    3,918.70/5,407.81 = 2,150.31/x
  3. Step 3: Cross multiply
    3,918.70x = 5,407.81 × 2,150.31
  4. Step 4: Simplify right side
    3,918.70x = 11,628,462.55
  5. Step 5: Solve for x
    x = 11,628,462.55/3,918.70
  6. Step 6: Final answer
    x = 2,967.43

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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.