Home / 3,928.60-5,888.70-2,171.68

Finding the Fourth Proportional to 3,928.60, 5,888.70 and 2,171.68

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Solution

The fourth proportional to 3,928.60, 5,888.70 and 2,171.68 is: 3,255.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.60 : 5,888.70 = 2,171.68 : x
  2. Step 2: Convert to fraction form
    3,928.60/5,888.70 = 2,171.68/x
  3. Step 3: Cross multiply
    3,928.60x = 5,888.70 × 2,171.68
  4. Step 4: Simplify right side
    3,928.60x = 12,788,372.02
  5. Step 5: Solve for x
    x = 12,788,372.02/3,928.60
  6. Step 6: Final answer
    x = 3,255.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.