Home / 3,781.20-5,671.80-3,176.40

Finding the Fourth Proportional to 3,781.20, 5,671.80 and 3,176.40

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Solution

The fourth proportional to 3,781.20, 5,671.80 and 3,176.40 is: 4,764.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.20 : 5,671.80 = 3,176.40 : x
  2. Step 2: Convert to fraction form
    3,781.20/5,671.80 = 3,176.40/x
  3. Step 3: Cross multiply
    3,781.20x = 5,671.80 × 3,176.40
  4. Step 4: Simplify right side
    3,781.20x = 18,015,905.52
  5. Step 5: Solve for x
    x = 18,015,905.52/3,781.20
  6. Step 6: Final answer
    x = 4,764.60

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1.5x scale

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.