Home / 3,935.80-5,431.32-2,167.36

Finding the Fourth Proportional to 3,935.80, 5,431.32 and 2,167.36

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Solution

The fourth proportional to 3,935.80, 5,431.32 and 2,167.36 is: 2,990.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,935.80 : 5,431.32 = 2,167.36 : x
  2. Step 2: Convert to fraction form
    3,935.80/5,431.32 = 2,167.36/x
  3. Step 3: Cross multiply
    3,935.80x = 5,431.32 × 2,167.36
  4. Step 4: Simplify right side
    3,935.80x = 11,771,625.72
  5. Step 5: Solve for x
    x = 11,771,625.72/3,935.80
  6. Step 6: Final answer
    x = 2,990.91

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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.