Home / 21,074.24-31,611.11-12,183.90

Finding the Fourth Proportional to 21,074.24, 31,611.11 and 12,183.90

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Solution

The fourth proportional to 21,074.24, 31,611.11 and 12,183.90 is: 18,275.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,074.24 : 31,611.11 = 12,183.90 : x
  2. Step 2: Convert to fraction form
    21,074.24/31,611.11 = 12,183.90/x
  3. Step 3: Cross multiply
    21,074.24x = 31,611.11 × 12,183.90
  4. Step 4: Simplify right side
    21,074.24x = 385,146,542.21
  5. Step 5: Solve for x
    x = 385,146,542.21/21,074.24
  6. Step 6: Final answer
    x = 18,275.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.