Home / 3,960.08-5,931.99-1,979.78

Finding the Fourth Proportional to 3,960.08, 5,931.99 and 1,979.78

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Solution

The fourth proportional to 3,960.08, 5,931.99 and 1,979.78 is: 2,965.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,960.08 : 5,931.99 = 1,979.78 : x
  2. Step 2: Convert to fraction form
    3,960.08/5,931.99 = 1,979.78/x
  3. Step 3: Cross multiply
    3,960.08x = 5,931.99 × 1,979.78
  4. Step 4: Simplify right side
    3,960.08x = 11,744,035.16
  5. Step 5: Solve for x
    x = 11,744,035.16/3,960.08
  6. Step 6: Final answer
    x = 2,965.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.