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Finding the Fourth Proportional to 11,999.20, 18,004.20 and 4,213.60

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Solution

The fourth proportional to 11,999.20, 18,004.20 and 4,213.60 is: 6,322.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,999.20 : 18,004.20 = 4,213.60 : x
  2. Step 2: Convert to fraction form
    11,999.20/18,004.20 = 4,213.60/x
  3. Step 3: Cross multiply
    11,999.20x = 18,004.20 × 4,213.60
  4. Step 4: Simplify right side
    11,999.20x = 75,862,497.12
  5. Step 5: Solve for x
    x = 75,862,497.12/11,999.20
  6. Step 6: Final answer
    x = 6,322.30

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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.