Home / 7,143.08-9,856.94-3,998.66

Finding the Fourth Proportional to 7,143.08, 9,856.94 and 3,998.66

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Solution

The fourth proportional to 7,143.08, 9,856.94 and 3,998.66 is: 5,517.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,143.08 : 9,856.94 = 3,998.66 : x
  2. Step 2: Convert to fraction form
    7,143.08/9,856.94 = 3,998.66/x
  3. Step 3: Cross multiply
    7,143.08x = 9,856.94 × 3,998.66
  4. Step 4: Simplify right side
    7,143.08x = 39,414,482.42
  5. Step 5: Solve for x
    x = 39,414,482.42/7,143.08
  6. Step 6: Final answer
    x = 5,517.86

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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.