Home / 21,135.45-29,163.14-12,183.33

Finding the Fourth Proportional to 21,135.45, 29,163.14 and 12,183.33

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Solution

The fourth proportional to 21,135.45, 29,163.14 and 12,183.33 is: 16,810.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,135.45 : 29,163.14 = 12,183.33 : x
  2. Step 2: Convert to fraction form
    21,135.45/29,163.14 = 12,183.33/x
  3. Step 3: Cross multiply
    21,135.45x = 29,163.14 × 12,183.33
  4. Step 4: Simplify right side
    21,135.45x = 355,304,097.54
  5. Step 5: Solve for x
    x = 355,304,097.54/21,135.45
  6. Step 6: Final answer
    x = 16,810.81

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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.