Home / 13,119-18,104-7,150.72

Finding the Fourth Proportional to 13,119, 18,104 and 7,150.72

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Solution

The fourth proportional to 13,119, 18,104 and 7,150.72 is: 9,867.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,119 : 18,104 = 7,150.72 : x
  2. Step 2: Convert to fraction form
    13,119/18,104 = 7,150.72/x
  3. Step 3: Cross multiply
    13,119x = 18,104 × 7,150.72
  4. Step 4: Simplify right side
    13,119x = 129,456,634.88
  5. Step 5: Solve for x
    x = 129,456,634.88/13,119
  6. Step 6: Final answer
    x = 9,867.87

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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.