Home / 5,156.15-7,121.39-3,395.61

Finding the Fourth Proportional to 5,156.15, 7,121.39 and 3,395.61

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Solution

The fourth proportional to 5,156.15, 7,121.39 and 3,395.61 is: 4,689.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,156.15 : 7,121.39 = 3,395.61 : x
  2. Step 2: Convert to fraction form
    5,156.15/7,121.39 = 3,395.61/x
  3. Step 3: Cross multiply
    5,156.15x = 7,121.39 × 3,395.61
  4. Step 4: Simplify right side
    5,156.15x = 24,181,446.12
  5. Step 5: Solve for x
    x = 24,181,446.12/5,156.15
  6. Step 6: Final answer
    x = 4,689.83

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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.