Home / 11,515.40-17,272.19-4,119.09

Finding the Fourth Proportional to 11,515.40, 17,272.19 and 4,119.09

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Solution

The fourth proportional to 11,515.40, 17,272.19 and 4,119.09 is: 6,178.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,515.40 : 17,272.19 = 4,119.09 : x
  2. Step 2: Convert to fraction form
    11,515.40/17,272.19 = 4,119.09/x
  3. Step 3: Cross multiply
    11,515.40x = 17,272.19 × 4,119.09
  4. Step 4: Simplify right side
    11,515.40x = 71,145,705.11
  5. Step 5: Solve for x
    x = 71,145,705.11/11,515.40
  6. Step 6: Final answer
    x = 6,178.31

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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.