Home / 3,831.20-5,285.52-2,780.96

Finding the Fourth Proportional to 3,831.20, 5,285.52 and 2,780.96

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Solution

The fourth proportional to 3,831.20, 5,285.52 and 2,780.96 is: 3,836.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,831.20 : 5,285.52 = 2,780.96 : x
  2. Step 2: Convert to fraction form
    3,831.20/5,285.52 = 2,780.96/x
  3. Step 3: Cross multiply
    3,831.20x = 5,285.52 × 2,780.96
  4. Step 4: Simplify right side
    3,831.20x = 14,698,819.70
  5. Step 5: Solve for x
    x = 14,698,819.70/3,831.20
  6. Step 6: Final answer
    x = 3,836.61

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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.