Home / 3,520.80-4,867.20-2,685.60

Finding the Fourth Proportional to 3,520.80, 4,867.20 and 2,685.60

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Solution

The fourth proportional to 3,520.80, 4,867.20 and 2,685.60 is: 3,712.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,520.80 : 4,867.20 = 2,685.60 : x
  2. Step 2: Convert to fraction form
    3,520.80/4,867.20 = 2,685.60/x
  3. Step 3: Cross multiply
    3,520.80x = 4,867.20 × 2,685.60
  4. Step 4: Simplify right side
    3,520.80x = 13,071,352.32
  5. Step 5: Solve for x
    x = 13,071,352.32/3,520.80
  6. Step 6: Final answer
    x = 3,712.61

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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.