Home / 3,928.54-5,421.42-2,136.01

Finding the Fourth Proportional to 3,928.54, 5,421.42 and 2,136.01

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Solution

The fourth proportional to 3,928.54, 5,421.42 and 2,136.01 is: 2,947.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.54 : 5,421.42 = 2,136.01 : x
  2. Step 2: Convert to fraction form
    3,928.54/5,421.42 = 2,136.01/x
  3. Step 3: Cross multiply
    3,928.54x = 5,421.42 × 2,136.01
  4. Step 4: Simplify right side
    3,928.54x = 11,580,207.33
  5. Step 5: Solve for x
    x = 11,580,207.33/3,928.54
  6. Step 6: Final answer
    x = 2,947.71

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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.