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Finding the Fourth Proportional to 13,488.80, 18,611.34 and 8,183.48

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Solution

The fourth proportional to 13,488.80, 18,611.34 and 8,183.48 is: 11,291.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,488.80 : 18,611.34 = 8,183.48 : x
  2. Step 2: Convert to fraction form
    13,488.80/18,611.34 = 8,183.48/x
  3. Step 3: Cross multiply
    13,488.80x = 18,611.34 × 8,183.48
  4. Step 4: Simplify right side
    13,488.80x = 152,305,528.66
  5. Step 5: Solve for x
    x = 152,305,528.66/13,488.80
  6. Step 6: Final answer
    x = 11,291.26

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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.