Home / 3,918.33-5,406.89-2,149.74

Finding the Fourth Proportional to 3,918.33, 5,406.89 and 2,149.74

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Solution

The fourth proportional to 3,918.33, 5,406.89 and 2,149.74 is: 2,966.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.33 : 5,406.89 = 2,149.74 : x
  2. Step 2: Convert to fraction form
    3,918.33/5,406.89 = 2,149.74/x
  3. Step 3: Cross multiply
    3,918.33x = 5,406.89 × 2,149.74
  4. Step 4: Simplify right side
    3,918.33x = 11,623,396.96
  5. Step 5: Solve for x
    x = 11,623,396.96/3,918.33
  6. Step 6: Final answer
    x = 2,966.42

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1.5x scale

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.