Home / 3,920.27-5,410.05-2,151.86

Finding the Fourth Proportional to 3,920.27, 5,410.05 and 2,151.86

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Solution

The fourth proportional to 3,920.27, 5,410.05 and 2,151.86 is: 2,969.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.27 : 5,410.05 = 2,151.86 : x
  2. Step 2: Convert to fraction form
    3,920.27/5,410.05 = 2,151.86/x
  3. Step 3: Cross multiply
    3,920.27x = 5,410.05 × 2,151.86
  4. Step 4: Simplify right side
    3,920.27x = 11,641,670.19
  5. Step 5: Solve for x
    x = 11,641,670.19/3,920.27
  6. Step 6: Final answer
    x = 2,969.61

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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.