Home / 12,083.52-18,120-7,163.04

Finding the Fourth Proportional to 12,083.52, 18,120 and 7,163.04

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Solution

The fourth proportional to 12,083.52, 18,120 and 7,163.04 is: 10,741.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,083.52 : 18,120 = 7,163.04 : x
  2. Step 2: Convert to fraction form
    12,083.52/18,120 = 7,163.04/x
  3. Step 3: Cross multiply
    12,083.52x = 18,120 × 7,163.04
  4. Step 4: Simplify right side
    12,083.52x = 129,794,284.80
  5. Step 5: Solve for x
    x = 129,794,284.80/12,083.52
  6. Step 6: Final answer
    x = 10,741.43

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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.