Home / 3,831.26-5,290.25-3,123.20

Finding the Fourth Proportional to 3,831.26, 5,290.25 and 3,123.20

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Solution

The fourth proportional to 3,831.26, 5,290.25 and 3,123.20 is: 4,312.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,831.26 : 5,290.25 = 3,123.20 : x
  2. Step 2: Convert to fraction form
    3,831.26/5,290.25 = 3,123.20/x
  3. Step 3: Cross multiply
    3,831.26x = 5,290.25 × 3,123.20
  4. Step 4: Simplify right side
    3,831.26x = 16,522,466.73
  5. Step 5: Solve for x
    x = 16,522,466.73/3,831.26
  6. Step 6: Final answer
    x = 4,312.55

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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.