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Finding the Fourth Proportional to 13,047.41, 18,020.39 and 8,591.09

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Solution

The fourth proportional to 13,047.41, 18,020.39 and 8,591.09 is: 11,865.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,047.41 : 18,020.39 = 8,591.09 : x
  2. Step 2: Convert to fraction form
    13,047.41/18,020.39 = 8,591.09/x
  3. Step 3: Cross multiply
    13,047.41x = 18,020.39 × 8,591.09
  4. Step 4: Simplify right side
    13,047.41x = 154,814,659.27
  5. Step 5: Solve for x
    x = 154,814,659.27/13,047.41
  6. Step 6: Final answer
    x = 11,865.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.