Home / 5,121.86-7,067.90-2,883.66

Finding the Fourth Proportional to 5,121.86, 7,067.90 and 2,883.66

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Solution

The fourth proportional to 5,121.86, 7,067.90 and 2,883.66 is: 3,979.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.86 : 7,067.90 = 2,883.66 : x
  2. Step 2: Convert to fraction form
    5,121.86/7,067.90 = 2,883.66/x
  3. Step 3: Cross multiply
    5,121.86x = 7,067.90 × 2,883.66
  4. Step 4: Simplify right side
    5,121.86x = 20,381,406.10
  5. Step 5: Solve for x
    x = 20,381,406.10/5,121.86
  6. Step 6: Final answer
    x = 3,979.30

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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.