Home / 2,621.40-3,940.20-2,572.80

Finding the Fourth Proportional to 2,621.40, 3,940.20 and 2,572.80

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Solution

The fourth proportional to 2,621.40, 3,940.20 and 2,572.80 is: 3,867.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,621.40 : 3,940.20 = 2,572.80 : x
  2. Step 2: Convert to fraction form
    2,621.40/3,940.20 = 2,572.80/x
  3. Step 3: Cross multiply
    2,621.40x = 3,940.20 × 2,572.80
  4. Step 4: Simplify right side
    2,621.40x = 10,137,346.56
  5. Step 5: Solve for x
    x = 10,137,346.56/2,621.40
  6. Step 6: Final answer
    x = 3,867.15

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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.