Home / 11,515.99-17,244.82-7,120.12

Finding the Fourth Proportional to 11,515.99, 17,244.82 and 7,120.12

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Solution

The fourth proportional to 11,515.99, 17,244.82 and 7,120.12 is: 10,662.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,515.99 : 17,244.82 = 7,120.12 : x
  2. Step 2: Convert to fraction form
    11,515.99/17,244.82 = 7,120.12/x
  3. Step 3: Cross multiply
    11,515.99x = 17,244.82 × 7,120.12
  4. Step 4: Simplify right side
    11,515.99x = 122,785,187.78
  5. Step 5: Solve for x
    x = 122,785,187.78/11,515.99
  6. Step 6: Final answer
    x = 10,662.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.