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Finding the Fourth Proportional to 13,558.87, 20,331.01 and 4,194.87

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Solution

The fourth proportional to 13,558.87, 20,331.01 and 4,194.87 is: 6,290.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,558.87 : 20,331.01 = 4,194.87 : x
  2. Step 2: Convert to fraction form
    13,558.87/20,331.01 = 4,194.87/x
  3. Step 3: Cross multiply
    13,558.87x = 20,331.01 × 4,194.87
  4. Step 4: Simplify right side
    13,558.87x = 85,285,943.92
  5. Step 5: Solve for x
    x = 85,285,943.92/13,558.87
  6. Step 6: Final answer
    x = 6,290.05

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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.