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Finding the Fourth Proportional to 13,481.76, 20,225.86 and 4,247.76

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Solution

The fourth proportional to 13,481.76, 20,225.86 and 4,247.76 is: 6,372.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,481.76 : 20,225.86 = 4,247.76 : x
  2. Step 2: Convert to fraction form
    13,481.76/20,225.86 = 4,247.76/x
  3. Step 3: Cross multiply
    13,481.76x = 20,225.86 × 4,247.76
  4. Step 4: Simplify right side
    13,481.76x = 85,914,599.07
  5. Step 5: Solve for x
    x = 85,914,599.07/13,481.76
  6. Step 6: Final answer
    x = 6,372.65

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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.