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Finding the Fourth Proportional to 13,173.68, 18,189.18 and 8,144.79

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Solution

The fourth proportional to 13,173.68, 18,189.18 and 8,144.79 is: 11,245.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,173.68 : 18,189.18 = 8,144.79 : x
  2. Step 2: Convert to fraction form
    13,173.68/18,189.18 = 8,144.79/x
  3. Step 3: Cross multiply
    13,173.68x = 18,189.18 × 8,144.79
  4. Step 4: Simplify right side
    13,173.68x = 148,147,051.37
  5. Step 5: Solve for x
    x = 148,147,051.37/13,173.68
  6. Step 6: Final answer
    x = 11,245.69

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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.