Home / 21,145.05-29,183.27-12,190.80

Finding the Fourth Proportional to 21,145.05, 29,183.27 and 12,190.80

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Solution

The fourth proportional to 21,145.05, 29,183.27 and 12,190.80 is: 16,825.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,145.05 : 29,183.27 = 12,190.80 : x
  2. Step 2: Convert to fraction form
    21,145.05/29,183.27 = 12,190.80/x
  3. Step 3: Cross multiply
    21,145.05x = 29,183.27 × 12,190.80
  4. Step 4: Simplify right side
    21,145.05x = 355,767,407.92
  5. Step 5: Solve for x
    x = 355,767,407.92/21,145.05
  6. Step 6: Final answer
    x = 16,825.10

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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.