Home / 20,121.08-30,211.23-11,253.78

Finding the Fourth Proportional to 20,121.08, 30,211.23 and 11,253.78

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Solution

The fourth proportional to 20,121.08, 30,211.23 and 11,253.78 is: 16,897.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.08 : 30,211.23 = 11,253.78 : x
  2. Step 2: Convert to fraction form
    20,121.08/30,211.23 = 11,253.78/x
  3. Step 3: Cross multiply
    20,121.08x = 30,211.23 × 11,253.78
  4. Step 4: Simplify right side
    20,121.08x = 339,990,535.95
  5. Step 5: Solve for x
    x = 339,990,535.95/20,121.08
  6. Step 6: Final answer
    x = 16,897.24

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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.