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Finding the Fourth Proportional to 13,040.80, 17,991.88 and 8,327.80

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Solution

The fourth proportional to 13,040.80, 17,991.88 and 8,327.80 is: 11,489.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,040.80 : 17,991.88 = 8,327.80 : x
  2. Step 2: Convert to fraction form
    13,040.80/17,991.88 = 8,327.80/x
  3. Step 3: Cross multiply
    13,040.80x = 17,991.88 × 8,327.80
  4. Step 4: Simplify right side
    13,040.80x = 149,832,778.26
  5. Step 5: Solve for x
    x = 149,832,778.26/13,040.80
  6. Step 6: Final answer
    x = 11,489.54

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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.