Home / 13,120.03-18,105.09-7,151.57

Finding the Fourth Proportional to 13,120.03, 18,105.09 and 7,151.57

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Solution

The fourth proportional to 13,120.03, 18,105.09 and 7,151.57 is: 9,868.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.03 : 18,105.09 = 7,151.57 : x
  2. Step 2: Convert to fraction form
    13,120.03/18,105.09 = 7,151.57/x
  3. Step 3: Cross multiply
    13,120.03x = 18,105.09 × 7,151.57
  4. Step 4: Simplify right side
    13,120.03x = 129,479,727.97
  5. Step 5: Solve for x
    x = 129,479,727.97/13,120.03
  6. Step 6: Final answer
    x = 9,868.86

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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.