Home / 3,928.60-5,421.39-2,136.04

Finding the Fourth Proportional to 3,928.60, 5,421.39 and 2,136.04

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Solution

The fourth proportional to 3,928.60, 5,421.39 and 2,136.04 is: 2,947.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.60 : 5,421.39 = 2,136.04 : x
  2. Step 2: Convert to fraction form
    3,928.60/5,421.39 = 2,136.04/x
  3. Step 3: Cross multiply
    3,928.60x = 5,421.39 × 2,136.04
  4. Step 4: Simplify right side
    3,928.60x = 11,580,305.90
  5. Step 5: Solve for x
    x = 11,580,305.90/3,928.60
  6. Step 6: Final answer
    x = 2,947.69

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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.