Home / 20,120.70-30,205.35-19,974.90

Finding the Fourth Proportional to 20,120.70, 30,205.35 and 19,974.90

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Solution

The fourth proportional to 20,120.70, 30,205.35 and 19,974.90 is: 29,986.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.70 : 30,205.35 = 19,974.90 : x
  2. Step 2: Convert to fraction form
    20,120.70/30,205.35 = 19,974.90/x
  3. Step 3: Cross multiply
    20,120.70x = 30,205.35 × 19,974.90
  4. Step 4: Simplify right side
    20,120.70x = 603,348,845.72
  5. Step 5: Solve for x
    x = 603,348,845.72/20,120.70
  6. Step 6: Final answer
    x = 29,986.47

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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.