Home / 3,869.87-5,340.66-2,191.35

Finding the Fourth Proportional to 3,869.87, 5,340.66 and 2,191.35

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Solution

The fourth proportional to 3,869.87, 5,340.66 and 2,191.35 is: 3,024.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,869.87 : 5,340.66 = 2,191.35 : x
  2. Step 2: Convert to fraction form
    3,869.87/5,340.66 = 2,191.35/x
  3. Step 3: Cross multiply
    3,869.87x = 5,340.66 × 2,191.35
  4. Step 4: Simplify right side
    3,869.87x = 11,703,249.39
  5. Step 5: Solve for x
    x = 11,703,249.39/3,869.87
  6. Step 6: Final answer
    x = 3,024.20

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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.