Home / 4,086.80-5,639.40-2,829.20

Finding the Fourth Proportional to 4,086.80, 5,639.40 and 2,829.20

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Solution

The fourth proportional to 4,086.80, 5,639.40 and 2,829.20 is: 3,904.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,086.80 : 5,639.40 = 2,829.20 : x
  2. Step 2: Convert to fraction form
    4,086.80/5,639.40 = 2,829.20/x
  3. Step 3: Cross multiply
    4,086.80x = 5,639.40 × 2,829.20
  4. Step 4: Simplify right side
    4,086.80x = 15,954,990.48
  5. Step 5: Solve for x
    x = 15,954,990.48/4,086.80
  6. Step 6: Final answer
    x = 3,904.03

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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.