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Finding the Fourth Proportional to 13,168.44, 18,169.92 and 7,861.32

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Solution

The fourth proportional to 13,168.44, 18,169.92 and 7,861.32 is: 10,847.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,168.44 : 18,169.92 = 7,861.32 : x
  2. Step 2: Convert to fraction form
    13,168.44/18,169.92 = 7,861.32/x
  3. Step 3: Cross multiply
    13,168.44x = 18,169.92 × 7,861.32
  4. Step 4: Simplify right side
    13,168.44x = 142,839,555.49
  5. Step 5: Solve for x
    x = 142,839,555.49/13,168.44
  6. Step 6: Final answer
    x = 10,847.11

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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.