Home / 20,972.20-28,942.83-12,021.19

Finding the Fourth Proportional to 20,972.20, 28,942.83 and 12,021.19

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Solution

The fourth proportional to 20,972.20, 28,942.83 and 12,021.19 is: 16,589.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.20 : 28,942.83 = 12,021.19 : x
  2. Step 2: Convert to fraction form
    20,972.20/28,942.83 = 12,021.19/x
  3. Step 3: Cross multiply
    20,972.20x = 28,942.83 × 12,021.19
  4. Step 4: Simplify right side
    20,972.20x = 347,927,258.57
  5. Step 5: Solve for x
    x = 347,927,258.57/20,972.20
  6. Step 6: Final answer
    x = 16,589.93

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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.