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Finding the Fourth Proportional to 13,361.20, 20,043 and 3,500.32

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Solution

The fourth proportional to 13,361.20, 20,043 and 3,500.32 is: 5,250.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,361.20 : 20,043 = 3,500.32 : x
  2. Step 2: Convert to fraction form
    13,361.20/20,043 = 3,500.32/x
  3. Step 3: Cross multiply
    13,361.20x = 20,043 × 3,500.32
  4. Step 4: Simplify right side
    13,361.20x = 70,156,913.76
  5. Step 5: Solve for x
    x = 70,156,913.76/13,361.20
  6. Step 6: Final answer
    x = 5,250.79

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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.