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Finding the Fourth Proportional to 13,752.75, 18,983.72 and 8,163.75

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Solution

The fourth proportional to 13,752.75, 18,983.72 and 8,163.75 is: 11,268.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,752.75 : 18,983.72 = 8,163.75 : x
  2. Step 2: Convert to fraction form
    13,752.75/18,983.72 = 8,163.75/x
  3. Step 3: Cross multiply
    13,752.75x = 18,983.72 × 8,163.75
  4. Step 4: Simplify right side
    13,752.75x = 154,978,303.33
  5. Step 5: Solve for x
    x = 154,978,303.33/13,752.75
  6. Step 6: Final answer
    x = 11,268.90

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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.