Home / 3,847.15-5,309.04-2,275.21

Finding the Fourth Proportional to 3,847.15, 5,309.04 and 2,275.21

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Solution

The fourth proportional to 3,847.15, 5,309.04 and 2,275.21 is: 3,139.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,847.15 : 5,309.04 = 2,275.21 : x
  2. Step 2: Convert to fraction form
    3,847.15/5,309.04 = 2,275.21/x
  3. Step 3: Cross multiply
    3,847.15x = 5,309.04 × 2,275.21
  4. Step 4: Simplify right side
    3,847.15x = 12,079,180.90
  5. Step 5: Solve for x
    x = 12,079,180.90/3,847.15
  6. Step 6: Final answer
    x = 3,139.77

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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.