Home / 11,385.29-17,078.06-3,989.75

Finding the Fourth Proportional to 11,385.29, 17,078.06 and 3,989.75

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Solution

The fourth proportional to 11,385.29, 17,078.06 and 3,989.75 is: 5,984.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,385.29 : 17,078.06 = 3,989.75 : x
  2. Step 2: Convert to fraction form
    11,385.29/17,078.06 = 3,989.75/x
  3. Step 3: Cross multiply
    11,385.29x = 17,078.06 × 3,989.75
  4. Step 4: Simplify right side
    11,385.29x = 68,137,114.47
  5. Step 5: Solve for x
    x = 68,137,114.47/11,385.29
  6. Step 6: Final answer
    x = 5,984.66

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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.