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Finding the Fourth Proportional to 13,996.64, 20,972.28 and 8,793.20

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Solution

The fourth proportional to 13,996.64, 20,972.28 and 8,793.20 is: 13,175.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,996.64 : 20,972.28 = 8,793.20 : x
  2. Step 2: Convert to fraction form
    13,996.64/20,972.28 = 8,793.20/x
  3. Step 3: Cross multiply
    13,996.64x = 20,972.28 × 8,793.20
  4. Step 4: Simplify right side
    13,996.64x = 184,413,452.50
  5. Step 5: Solve for x
    x = 184,413,452.50/13,996.64
  6. Step 6: Final answer
    x = 13,175.55

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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.