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Finding the Fourth Proportional to 18,801.21, 28,202.12 and 8,938.50

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Solution

The fourth proportional to 18,801.21, 28,202.12 and 8,938.50 is: 13,407.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,801.21 : 28,202.12 = 8,938.50 : x
  2. Step 2: Convert to fraction form
    18,801.21/28,202.12 = 8,938.50/x
  3. Step 3: Cross multiply
    18,801.21x = 28,202.12 × 8,938.50
  4. Step 4: Simplify right side
    18,801.21x = 252,084,741.60
  5. Step 5: Solve for x
    x = 252,084,741.60/18,801.21
  6. Step 6: Final answer
    x = 13,407.90

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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.