Home / 11,520.97-17,281.33-5,279.21

Finding the Fourth Proportional to 11,520.97, 17,281.33 and 5,279.21

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Solution

The fourth proportional to 11,520.97, 17,281.33 and 5,279.21 is: 7,918.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,520.97 : 17,281.33 = 5,279.21 : x
  2. Step 2: Convert to fraction form
    11,520.97/17,281.33 = 5,279.21/x
  3. Step 3: Cross multiply
    11,520.97x = 17,281.33 × 5,279.21
  4. Step 4: Simplify right side
    11,520.97x = 91,231,657.35
  5. Step 5: Solve for x
    x = 91,231,657.35/11,520.97
  6. Step 6: Final answer
    x = 7,918.75

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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.