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Finding the Fourth Proportional to 13,906.76, 20,858.44 and 5,586.44

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Solution

The fourth proportional to 13,906.76, 20,858.44 and 5,586.44 is: 8,378.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,906.76 : 20,858.44 = 5,586.44 : x
  2. Step 2: Convert to fraction form
    13,906.76/20,858.44 = 5,586.44/x
  3. Step 3: Cross multiply
    13,906.76x = 20,858.44 × 5,586.44
  4. Step 4: Simplify right side
    13,906.76x = 116,524,423.55
  5. Step 5: Solve for x
    x = 116,524,423.55/13,906.76
  6. Step 6: Final answer
    x = 8,378.98

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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.