Home / 3,888.30-5,356.41-2,891.85

Finding the Fourth Proportional to 3,888.30, 5,356.41 and 2,891.85

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Solution

The fourth proportional to 3,888.30, 5,356.41 and 2,891.85 is: 3,983.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,888.30 : 5,356.41 = 2,891.85 : x
  2. Step 2: Convert to fraction form
    3,888.30/5,356.41 = 2,891.85/x
  3. Step 3: Cross multiply
    3,888.30x = 5,356.41 × 2,891.85
  4. Step 4: Simplify right side
    3,888.30x = 15,489,934.26
  5. Step 5: Solve for x
    x = 15,489,934.26/3,888.30
  6. Step 6: Final answer
    x = 3,983.73

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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.