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Finding the Fourth Proportional to 13,619, 18,794.22 and 8,659.64

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Solution

The fourth proportional to 13,619, 18,794.22 and 8,659.64 is: 11,950.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,619 : 18,794.22 = 8,659.64 : x
  2. Step 2: Convert to fraction form
    13,619/18,794.22 = 8,659.64/x
  3. Step 3: Cross multiply
    13,619x = 18,794.22 × 8,659.64
  4. Step 4: Simplify right side
    13,619x = 162,751,179.28
  5. Step 5: Solve for x
    x = 162,751,179.28/13,619
  6. Step 6: Final answer
    x = 11,950.30

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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.