Home / 3,928.79-5,422-2,436.77

Finding the Fourth Proportional to 3,928.79, 5,422 and 2,436.77

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Solution

The fourth proportional to 3,928.79, 5,422 and 2,436.77 is: 3,362.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.79 : 5,422 = 2,436.77 : x
  2. Step 2: Convert to fraction form
    3,928.79/5,422 = 2,436.77/x
  3. Step 3: Cross multiply
    3,928.79x = 5,422 × 2,436.77
  4. Step 4: Simplify right side
    3,928.79x = 13,212,166.94
  5. Step 5: Solve for x
    x = 13,212,166.94/3,928.79
  6. Step 6: Final answer
    x = 3,362.91

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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.