Home / 3,891.11-5,368.55-2,399.42

Finding the Fourth Proportional to 3,891.11, 5,368.55 and 2,399.42

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Solution

The fourth proportional to 3,891.11, 5,368.55 and 2,399.42 is: 3,310.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.11 : 5,368.55 = 2,399.42 : x
  2. Step 2: Convert to fraction form
    3,891.11/5,368.55 = 2,399.42/x
  3. Step 3: Cross multiply
    3,891.11x = 5,368.55 × 2,399.42
  4. Step 4: Simplify right side
    3,891.11x = 12,881,407.67
  5. Step 5: Solve for x
    x = 12,881,407.67/3,891.11
  6. Step 6: Final answer
    x = 3,310.48

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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.