Home / 21,135.70-29,163.48-12,183.58

Finding the Fourth Proportional to 21,135.70, 29,163.48 and 12,183.58

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Solution

The fourth proportional to 21,135.70, 29,163.48 and 12,183.58 is: 16,811.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,135.70 : 29,163.48 = 12,183.58 : x
  2. Step 2: Convert to fraction form
    21,135.70/29,163.48 = 12,183.58/x
  3. Step 3: Cross multiply
    21,135.70x = 29,163.48 × 12,183.58
  4. Step 4: Simplify right side
    21,135.70x = 355,315,591.66
  5. Step 5: Solve for x
    x = 355,315,591.66/21,135.70
  6. Step 6: Final answer
    x = 16,811.16

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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.