Home / 13,131.57-18,121.62-7,163.37

Finding the Fourth Proportional to 13,131.57, 18,121.62 and 7,163.37

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Solution

The fourth proportional to 13,131.57, 18,121.62 and 7,163.37 is: 9,885.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,131.57 : 18,121.62 = 7,163.37 : x
  2. Step 2: Convert to fraction form
    13,131.57/18,121.62 = 7,163.37/x
  3. Step 3: Cross multiply
    13,131.57x = 18,121.62 × 7,163.37
  4. Step 4: Simplify right side
    13,131.57x = 129,811,869.06
  5. Step 5: Solve for x
    x = 129,811,869.06/13,131.57
  6. Step 6: Final answer
    x = 9,885.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.