Home / 2,859.18-3,960.56-2,800.86

Finding the Fourth Proportional to 2,859.18, 3,960.56 and 2,800.86

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Solution

The fourth proportional to 2,859.18, 3,960.56 and 2,800.86 is: 3,879.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,859.18 : 3,960.56 = 2,800.86 : x
  2. Step 2: Convert to fraction form
    2,859.18/3,960.56 = 2,800.86/x
  3. Step 3: Cross multiply
    2,859.18x = 3,960.56 × 2,800.86
  4. Step 4: Simplify right side
    2,859.18x = 11,092,960.08
  5. Step 5: Solve for x
    x = 11,092,960.08/2,859.18
  6. Step 6: Final answer
    x = 3,879.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.