Home / 3,856.20-5,785.10-1,906.12

Finding the Fourth Proportional to 3,856.20, 5,785.10 and 1,906.12

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Solution

The fourth proportional to 3,856.20, 5,785.10 and 1,906.12 is: 2,859.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,856.20 : 5,785.10 = 1,906.12 : x
  2. Step 2: Convert to fraction form
    3,856.20/5,785.10 = 1,906.12/x
  3. Step 3: Cross multiply
    3,856.20x = 5,785.10 × 1,906.12
  4. Step 4: Simplify right side
    3,856.20x = 11,027,094.81
  5. Step 5: Solve for x
    x = 11,027,094.81/3,856.20
  6. Step 6: Final answer
    x = 2,859.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.