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Finding the Fourth Proportional to 18,800.80, 28,201.20 and 15,517.60

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Solution

The fourth proportional to 18,800.80, 28,201.20 and 15,517.60 is: 23,276.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,800.80 : 28,201.20 = 15,517.60 : x
  2. Step 2: Convert to fraction form
    18,800.80/28,201.20 = 15,517.60/x
  3. Step 3: Cross multiply
    18,800.80x = 28,201.20 × 15,517.60
  4. Step 4: Simplify right side
    18,800.80x = 437,614,941.12
  5. Step 5: Solve for x
    x = 437,614,941.12/18,800.80
  6. Step 6: Final answer
    x = 23,276.40

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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.