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Finding the Fourth Proportional to 7,999.52, 11,990.32 and 2,729.62

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Solution

The fourth proportional to 7,999.52, 11,990.32 and 2,729.62 is: 4,091.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,999.52 : 11,990.32 = 2,729.62 : x
  2. Step 2: Convert to fraction form
    7,999.52/11,990.32 = 2,729.62/x
  3. Step 3: Cross multiply
    7,999.52x = 11,990.32 × 2,729.62
  4. Step 4: Simplify right side
    7,999.52x = 32,729,017.28
  5. Step 5: Solve for x
    x = 32,729,017.28/7,999.52
  6. Step 6: Final answer
    x = 4,091.37

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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.