Home / 3,920.14-5,409.77-2,127.58

Finding the Fourth Proportional to 3,920.14, 5,409.77 and 2,127.58

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Solution

The fourth proportional to 3,920.14, 5,409.77 and 2,127.58 is: 2,936.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.14 : 5,409.77 = 2,127.58 : x
  2. Step 2: Convert to fraction form
    3,920.14/5,409.77 = 2,127.58/x
  3. Step 3: Cross multiply
    3,920.14x = 5,409.77 × 2,127.58
  4. Step 4: Simplify right side
    3,920.14x = 11,509,718.46
  5. Step 5: Solve for x
    x = 11,509,718.46/3,920.14
  6. Step 6: Final answer
    x = 2,936.05

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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.