Home / 11,919.42-17,880.75-4,128.84

Finding the Fourth Proportional to 11,919.42, 17,880.75 and 4,128.84

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Solution

The fourth proportional to 11,919.42, 17,880.75 and 4,128.84 is: 6,193.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,919.42 : 17,880.75 = 4,128.84 : x
  2. Step 2: Convert to fraction form
    11,919.42/17,880.75 = 4,128.84/x
  3. Step 3: Cross multiply
    11,919.42x = 17,880.75 × 4,128.84
  4. Step 4: Simplify right side
    11,919.42x = 73,826,755.83
  5. Step 5: Solve for x
    x = 73,826,755.83/11,919.42
  6. Step 6: Final answer
    x = 6,193.82

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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.