Home / 13,179.36-18,180-11,611.20

Finding the Fourth Proportional to 13,179.36, 18,180 and 11,611.20

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Solution

The fourth proportional to 13,179.36, 18,180 and 11,611.20 is: 16,016.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.36 : 18,180 = 11,611.20 : x
  2. Step 2: Convert to fraction form
    13,179.36/18,180 = 11,611.20/x
  3. Step 3: Cross multiply
    13,179.36x = 18,180 × 11,611.20
  4. Step 4: Simplify right side
    13,179.36x = 211,091,616
  5. Step 5: Solve for x
    x = 211,091,616/13,179.36
  6. Step 6: Final answer
    x = 16,016.83

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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.