Home / 7,961.80-11,941.79-2,118.86

Finding the Fourth Proportional to 7,961.80, 11,941.79 and 2,118.86

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Solution

The fourth proportional to 7,961.80, 11,941.79 and 2,118.86 is: 3,178.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,961.80 : 11,941.79 = 2,118.86 : x
  2. Step 2: Convert to fraction form
    7,961.80/11,941.79 = 2,118.86/x
  3. Step 3: Cross multiply
    7,961.80x = 11,941.79 × 2,118.86
  4. Step 4: Simplify right side
    7,961.80x = 25,303,022.81
  5. Step 5: Solve for x
    x = 25,303,022.81/7,961.80
  6. Step 6: Final answer
    x = 3,178.05

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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.