Home / 13,131.48-18,121.60-7,163.09

Finding the Fourth Proportional to 13,131.48, 18,121.60 and 7,163.09

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Solution

The fourth proportional to 13,131.48, 18,121.60 and 7,163.09 is: 9,885.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,131.48 : 18,121.60 = 7,163.09 : x
  2. Step 2: Convert to fraction form
    13,131.48/18,121.60 = 7,163.09/x
  3. Step 3: Cross multiply
    13,131.48x = 18,121.60 × 7,163.09
  4. Step 4: Simplify right side
    13,131.48x = 129,806,651.74
  5. Step 5: Solve for x
    x = 129,806,651.74/13,131.48
  6. Step 6: Final answer
    x = 9,885.15

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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.