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Finding the Fourth Proportional to 8,986.96, 13,481.28 and 3,720.88

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Solution

The fourth proportional to 8,986.96, 13,481.28 and 3,720.88 is: 5,581.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,986.96 : 13,481.28 = 3,720.88 : x
  2. Step 2: Convert to fraction form
    8,986.96/13,481.28 = 3,720.88/x
  3. Step 3: Cross multiply
    8,986.96x = 13,481.28 × 3,720.88
  4. Step 4: Simplify right side
    8,986.96x = 50,162,225.13
  5. Step 5: Solve for x
    x = 50,162,225.13/8,986.96
  6. Step 6: Final answer
    x = 5,581.67

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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.