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Finding the Fourth Proportional to 11,999.43, 17,982.72 and 7,619.94

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Solution

The fourth proportional to 11,999.43, 17,982.72 and 7,619.94 is: 11,419.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,999.43 : 17,982.72 = 7,619.94 : x
  2. Step 2: Convert to fraction form
    11,999.43/17,982.72 = 7,619.94/x
  3. Step 3: Cross multiply
    11,999.43x = 17,982.72 × 7,619.94
  4. Step 4: Simplify right side
    11,999.43x = 137,027,247.44
  5. Step 5: Solve for x
    x = 137,027,247.44/11,999.43
  6. Step 6: Final answer
    x = 11,419.48

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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.