Home / 3,900.36-5,382.28-2,131.64

Finding the Fourth Proportional to 3,900.36, 5,382.28 and 2,131.64

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Solution

The fourth proportional to 3,900.36, 5,382.28 and 2,131.64 is: 2,941.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.36 : 5,382.28 = 2,131.64 : x
  2. Step 2: Convert to fraction form
    3,900.36/5,382.28 = 2,131.64/x
  3. Step 3: Cross multiply
    3,900.36x = 5,382.28 × 2,131.64
  4. Step 4: Simplify right side
    3,900.36x = 11,473,083.34
  5. Step 5: Solve for x
    x = 11,473,083.34/3,900.36
  6. Step 6: Final answer
    x = 2,941.54

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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.