Home / 3,138.24-4,328.16-2,831.04

Finding the Fourth Proportional to 3,138.24, 4,328.16 and 2,831.04

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Solution

The fourth proportional to 3,138.24, 4,328.16 and 2,831.04 is: 3,904.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.24 : 4,328.16 = 2,831.04 : x
  2. Step 2: Convert to fraction form
    3,138.24/4,328.16 = 2,831.04/x
  3. Step 3: Cross multiply
    3,138.24x = 4,328.16 × 2,831.04
  4. Step 4: Simplify right side
    3,138.24x = 12,253,194.09
  5. Step 5: Solve for x
    x = 12,253,194.09/3,138.24
  6. Step 6: Final answer
    x = 3,904.48

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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.