Home / 2,781.20-4,171.80-2,586.80

Finding the Fourth Proportional to 2,781.20, 4,171.80 and 2,586.80

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Solution

The fourth proportional to 2,781.20, 4,171.80 and 2,586.80 is: 3,880.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.20 : 4,171.80 = 2,586.80 : x
  2. Step 2: Convert to fraction form
    2,781.20/4,171.80 = 2,586.80/x
  3. Step 3: Cross multiply
    2,781.20x = 4,171.80 × 2,586.80
  4. Step 4: Simplify right side
    2,781.20x = 10,791,612.24
  5. Step 5: Solve for x
    x = 10,791,612.24/2,781.20
  6. Step 6: Final answer
    x = 3,880.20

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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.