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Finding the Fourth Proportional to 11,786.80, 17,679.72 and 3,995.60

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Solution

The fourth proportional to 11,786.80, 17,679.72 and 3,995.60 is: 5,993.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,786.80 : 17,679.72 = 3,995.60 : x
  2. Step 2: Convert to fraction form
    11,786.80/17,679.72 = 3,995.60/x
  3. Step 3: Cross multiply
    11,786.80x = 17,679.72 × 3,995.60
  4. Step 4: Simplify right side
    11,786.80x = 70,641,089.23
  5. Step 5: Solve for x
    x = 70,641,089.23/11,786.80
  6. Step 6: Final answer
    x = 5,993.24

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1.5x scale

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.