Home / 2,821.50-4,223.10-2,080.80

Finding the Fourth Proportional to 2,821.50, 4,223.10 and 2,080.80

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Solution

The fourth proportional to 2,821.50, 4,223.10 and 2,080.80 is: 3,114.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,821.50 : 4,223.10 = 2,080.80 : x
  2. Step 2: Convert to fraction form
    2,821.50/4,223.10 = 2,080.80/x
  3. Step 3: Cross multiply
    2,821.50x = 4,223.10 × 2,080.80
  4. Step 4: Simplify right side
    2,821.50x = 8,787,426.48
  5. Step 5: Solve for x
    x = 8,787,426.48/2,821.50
  6. Step 6: Final answer
    x = 3,114.45

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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.