Home / 3,918.06-5,406.92-2,149.63

Finding the Fourth Proportional to 3,918.06, 5,406.92 and 2,149.63

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Solution

The fourth proportional to 3,918.06, 5,406.92 and 2,149.63 is: 2,966.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.06 : 5,406.92 = 2,149.63 : x
  2. Step 2: Convert to fraction form
    3,918.06/5,406.92 = 2,149.63/x
  3. Step 3: Cross multiply
    3,918.06x = 5,406.92 × 2,149.63
  4. Step 4: Simplify right side
    3,918.06x = 11,622,858.17
  5. Step 5: Solve for x
    x = 11,622,858.17/3,918.06
  6. Step 6: Final answer
    x = 2,966.48

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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.