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Finding the Fourth Proportional to 15,999.20, 23,991.60 and 7,229.60

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Solution

The fourth proportional to 15,999.20, 23,991.60 and 7,229.60 is: 10,841.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,999.20 : 23,991.60 = 7,229.60 : x
  2. Step 2: Convert to fraction form
    15,999.20/23,991.60 = 7,229.60/x
  3. Step 3: Cross multiply
    15,999.20x = 23,991.60 × 7,229.60
  4. Step 4: Simplify right side
    15,999.20x = 173,449,671.36
  5. Step 5: Solve for x
    x = 173,449,671.36/15,999.20
  6. Step 6: Final answer
    x = 10,841.15

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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.