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Finding the Fourth Proportional to 19,500.80, 29,272.80 and 12,113.60

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Solution

The fourth proportional to 19,500.80, 29,272.80 and 12,113.60 is: 18,183.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,500.80 : 29,272.80 = 12,113.60 : x
  2. Step 2: Convert to fraction form
    19,500.80/29,272.80 = 12,113.60/x
  3. Step 3: Cross multiply
    19,500.80x = 29,272.80 × 12,113.60
  4. Step 4: Simplify right side
    19,500.80x = 354,598,990.08
  5. Step 5: Solve for x
    x = 354,598,990.08/19,500.80
  6. Step 6: Final answer
    x = 18,183.82

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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.