Home / 3,918.04-5,406.76-2,149.60

Finding the Fourth Proportional to 3,918.04, 5,406.76 and 2,149.60

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Solution

The fourth proportional to 3,918.04, 5,406.76 and 2,149.60 is: 2,966.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.04 : 5,406.76 = 2,149.60 : x
  2. Step 2: Convert to fraction form
    3,918.04/5,406.76 = 2,149.60/x
  3. Step 3: Cross multiply
    3,918.04x = 5,406.76 × 2,149.60
  4. Step 4: Simplify right side
    3,918.04x = 11,622,371.30
  5. Step 5: Solve for x
    x = 11,622,371.30/3,918.04
  6. Step 6: Final answer
    x = 2,966.37

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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.