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Finding the Fourth Proportional to 13,169.62, 18,173.81 and 7,201.22

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Solution

The fourth proportional to 13,169.62, 18,173.81 and 7,201.22 is: 9,937.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,169.62 : 18,173.81 = 7,201.22 : x
  2. Step 2: Convert to fraction form
    13,169.62/18,173.81 = 7,201.22/x
  3. Step 3: Cross multiply
    13,169.62x = 18,173.81 × 7,201.22
  4. Step 4: Simplify right side
    13,169.62x = 130,873,568.04
  5. Step 5: Solve for x
    x = 130,873,568.04/13,169.62
  6. Step 6: Final answer
    x = 9,937.54

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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.