Home / 3,920.20-5,410.16-2,591.60

Finding the Fourth Proportional to 3,920.20, 5,410.16 and 2,591.60

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Solution

The fourth proportional to 3,920.20, 5,410.16 and 2,591.60 is: 3,576.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.20 : 5,410.16 = 2,591.60 : x
  2. Step 2: Convert to fraction form
    3,920.20/5,410.16 = 2,591.60/x
  3. Step 3: Cross multiply
    3,920.20x = 5,410.16 × 2,591.60
  4. Step 4: Simplify right side
    3,920.20x = 14,020,970.66
  5. Step 5: Solve for x
    x = 14,020,970.66/3,920.20
  6. Step 6: Final answer
    x = 3,576.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.