Home / 3,115.11-4,298.86-1,856.73

Finding the Fourth Proportional to 3,115.11, 4,298.86 and 1,856.73

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Solution

The fourth proportional to 3,115.11, 4,298.86 and 1,856.73 is: 2,562.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.11 : 4,298.86 = 1,856.73 : x
  2. Step 2: Convert to fraction form
    3,115.11/4,298.86 = 1,856.73/x
  3. Step 3: Cross multiply
    3,115.11x = 4,298.86 × 1,856.73
  4. Step 4: Simplify right side
    3,115.11x = 7,981,825.81
  5. Step 5: Solve for x
    x = 7,981,825.81/3,115.11
  6. Step 6: Final answer
    x = 2,562.29

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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.