Home / 3,918.32-5,406.84-2,149.92

Finding the Fourth Proportional to 3,918.32, 5,406.84 and 2,149.92

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Solution

The fourth proportional to 3,918.32, 5,406.84 and 2,149.92 is: 2,966.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.32 : 5,406.84 = 2,149.92 : x
  2. Step 2: Convert to fraction form
    3,918.32/5,406.84 = 2,149.92/x
  3. Step 3: Cross multiply
    3,918.32x = 5,406.84 × 2,149.92
  4. Step 4: Simplify right side
    3,918.32x = 11,624,273.45
  5. Step 5: Solve for x
    x = 11,624,273.45/3,918.32
  6. Step 6: Final answer
    x = 2,966.65

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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.