Home / 4,221.60-6,329.16-2,139.90

Finding the Fourth Proportional to 4,221.60, 6,329.16 and 2,139.90

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Solution

The fourth proportional to 4,221.60, 6,329.16 and 2,139.90 is: 3,208.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,221.60 : 6,329.16 = 2,139.90 : x
  2. Step 2: Convert to fraction form
    4,221.60/6,329.16 = 2,139.90/x
  3. Step 3: Cross multiply
    4,221.60x = 6,329.16 × 2,139.90
  4. Step 4: Simplify right side
    4,221.60x = 13,543,769.48
  5. Step 5: Solve for x
    x = 13,543,769.48/4,221.60
  6. Step 6: Final answer
    x = 3,208.21

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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.