Home / 3,180-4,385.76-2,183.70

Finding the Fourth Proportional to 3,180, 4,385.76 and 2,183.70

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Solution

The fourth proportional to 3,180, 4,385.76 and 2,183.70 is: 3,011.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,180 : 4,385.76 = 2,183.70 : x
  2. Step 2: Convert to fraction form
    3,180/4,385.76 = 2,183.70/x
  3. Step 3: Cross multiply
    3,180x = 4,385.76 × 2,183.70
  4. Step 4: Simplify right side
    3,180x = 9,577,184.11
  5. Step 5: Solve for x
    x = 9,577,184.11/3,180
  6. Step 6: Final answer
    x = 3,011.69

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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.