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Finding the Fourth Proportional to 29,620.80, 44,409.60 and 12,081.60

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Solution

The fourth proportional to 29,620.80, 44,409.60 and 12,081.60 is: 18,113.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,620.80 : 44,409.60 = 12,081.60 : x
  2. Step 2: Convert to fraction form
    29,620.80/44,409.60 = 12,081.60/x
  3. Step 3: Cross multiply
    29,620.80x = 44,409.60 × 12,081.60
  4. Step 4: Simplify right side
    29,620.80x = 536,539,023.36
  5. Step 5: Solve for x
    x = 536,539,023.36/29,620.80
  6. Step 6: Final answer
    x = 18,113.59

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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.