Home / 3,918.25-5,407.18-2,149.82

Finding the Fourth Proportional to 3,918.25, 5,407.18 and 2,149.82

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Solution

The fourth proportional to 3,918.25, 5,407.18 and 2,149.82 is: 2,966.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.25 : 5,407.18 = 2,149.82 : x
  2. Step 2: Convert to fraction form
    3,918.25/5,407.18 = 2,149.82/x
  3. Step 3: Cross multiply
    3,918.25x = 5,407.18 × 2,149.82
  4. Step 4: Simplify right side
    3,918.25x = 11,624,431.30
  5. Step 5: Solve for x
    x = 11,624,431.30/3,918.25
  6. Step 6: Final answer
    x = 2,966.74

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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.