Home / 11,385.62-17,080.86-3,990.53

Finding the Fourth Proportional to 11,385.62, 17,080.86 and 3,990.53

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Solution

The fourth proportional to 11,385.62, 17,080.86 and 3,990.53 is: 5,986.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,385.62 : 17,080.86 = 3,990.53 : x
  2. Step 2: Convert to fraction form
    11,385.62/17,080.86 = 3,990.53/x
  3. Step 3: Cross multiply
    11,385.62x = 17,080.86 × 3,990.53
  4. Step 4: Simplify right side
    11,385.62x = 68,161,684.26
  5. Step 5: Solve for x
    x = 68,161,684.26/11,385.62
  6. Step 6: Final answer
    x = 5,986.65

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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.