Home / 13,131.85-18,121.61-7,163.64

Finding the Fourth Proportional to 13,131.85, 18,121.61 and 7,163.64

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Solution

The fourth proportional to 13,131.85, 18,121.61 and 7,163.64 is: 9,885.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,131.85 : 18,121.61 = 7,163.64 : x
  2. Step 2: Convert to fraction form
    13,131.85/18,121.61 = 7,163.64/x
  3. Step 3: Cross multiply
    13,131.85x = 18,121.61 × 7,163.64
  4. Step 4: Simplify right side
    13,131.85x = 129,816,563.83
  5. Step 5: Solve for x
    x = 129,816,563.83/13,131.85
  6. Step 6: Final answer
    x = 9,885.63

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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.