Home / 3,918.20-5,407.12-2,149.82

Finding the Fourth Proportional to 3,918.20, 5,407.12 and 2,149.82

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Solution

The fourth proportional to 3,918.20, 5,407.12 and 2,149.82 is: 2,966.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.20 : 5,407.12 = 2,149.82 : x
  2. Step 2: Convert to fraction form
    3,918.20/5,407.12 = 2,149.82/x
  3. Step 3: Cross multiply
    3,918.20x = 5,407.12 × 2,149.82
  4. Step 4: Simplify right side
    3,918.20x = 11,624,329.95
  5. Step 5: Solve for x
    x = 11,624,329.95/3,918.20
  6. Step 6: Final answer
    x = 2,966.75

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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.