Home / 3,960.18-5,940.20-1,186.81

Finding the Fourth Proportional to 3,960.18, 5,940.20 and 1,186.81

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Solution

The fourth proportional to 3,960.18, 5,940.20 and 1,186.81 is: 1,780.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,960.18 : 5,940.20 = 1,186.81 : x
  2. Step 2: Convert to fraction form
    3,960.18/5,940.20 = 1,186.81/x
  3. Step 3: Cross multiply
    3,960.18x = 5,940.20 × 1,186.81
  4. Step 4: Simplify right side
    3,960.18x = 7,049,876.88
  5. Step 5: Solve for x
    x = 7,049,876.88/3,960.18
  6. Step 6: Final answer
    x = 1,780.19

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1.5x scale

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.