Home / 4,139.60-6,209.40-3,781.20

Finding the Fourth Proportional to 4,139.60, 6,209.40 and 3,781.20

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Solution

The fourth proportional to 4,139.60, 6,209.40 and 3,781.20 is: 5,671.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,139.60 : 6,209.40 = 3,781.20 : x
  2. Step 2: Convert to fraction form
    4,139.60/6,209.40 = 3,781.20/x
  3. Step 3: Cross multiply
    4,139.60x = 6,209.40 × 3,781.20
  4. Step 4: Simplify right side
    4,139.60x = 23,478,983.28
  5. Step 5: Solve for x
    x = 23,478,983.28/4,139.60
  6. Step 6: Final answer
    x = 5,671.80

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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.