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Finding the Fourth Proportional to 13,487.84, 20,231.72 and 3,627.12

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Solution

The fourth proportional to 13,487.84, 20,231.72 and 3,627.12 is: 5,440.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,487.84 : 20,231.72 = 3,627.12 : x
  2. Step 2: Convert to fraction form
    13,487.84/20,231.72 = 3,627.12/x
  3. Step 3: Cross multiply
    13,487.84x = 20,231.72 × 3,627.12
  4. Step 4: Simplify right side
    13,487.84x = 73,382,876.25
  5. Step 5: Solve for x
    x = 73,382,876.25/13,487.84
  6. Step 6: Final answer
    x = 5,440.67

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.