Home / 3,920.27-5,409.95-2,127.71

Finding the Fourth Proportional to 3,920.27, 5,409.95 and 2,127.71

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Solution

The fourth proportional to 3,920.27, 5,409.95 and 2,127.71 is: 2,936.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.27 : 5,409.95 = 2,127.71 : x
  2. Step 2: Convert to fraction form
    3,920.27/5,409.95 = 2,127.71/x
  3. Step 3: Cross multiply
    3,920.27x = 5,409.95 × 2,127.71
  4. Step 4: Simplify right side
    3,920.27x = 11,510,767.03
  5. Step 5: Solve for x
    x = 11,510,767.03/3,920.27
  6. Step 6: Final answer
    x = 2,936.22

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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.