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Finding the Fourth Proportional to 18,800.64, 28,241.64 and 12,223.44

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Solution

The fourth proportional to 18,800.64, 28,241.64 and 12,223.44 is: 18,361.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,800.64 : 28,241.64 = 12,223.44 : x
  2. Step 2: Convert to fraction form
    18,800.64/28,241.64 = 12,223.44/x
  3. Step 3: Cross multiply
    18,800.64x = 28,241.64 × 12,223.44
  4. Step 4: Simplify right side
    18,800.64x = 345,209,992.04
  5. Step 5: Solve for x
    x = 345,209,992.04/18,800.64
  6. Step 6: Final answer
    x = 18,361.61

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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.