Home / 3,847.28-5,308.66-2,520.80

Finding the Fourth Proportional to 3,847.28, 5,308.66 and 2,520.80

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Solution

The fourth proportional to 3,847.28, 5,308.66 and 2,520.80 is: 3,478.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,847.28 : 5,308.66 = 2,520.80 : x
  2. Step 2: Convert to fraction form
    3,847.28/5,308.66 = 2,520.80/x
  3. Step 3: Cross multiply
    3,847.28x = 5,308.66 × 2,520.80
  4. Step 4: Simplify right side
    3,847.28x = 13,382,070.13
  5. Step 5: Solve for x
    x = 13,382,070.13/3,847.28
  6. Step 6: Final answer
    x = 3,478.32

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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.