Home / 20,139.80-30,180.90-13,976.60

Finding the Fourth Proportional to 20,139.80, 30,180.90 and 13,976.60

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Solution

The fourth proportional to 20,139.80, 30,180.90 and 13,976.60 is: 20,944.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.80 : 30,180.90 = 13,976.60 : x
  2. Step 2: Convert to fraction form
    20,139.80/30,180.90 = 13,976.60/x
  3. Step 3: Cross multiply
    20,139.80x = 30,180.90 × 13,976.60
  4. Step 4: Simplify right side
    20,139.80x = 421,826,366.94
  5. Step 5: Solve for x
    x = 421,826,366.94/20,139.80
  6. Step 6: Final answer
    x = 20,944.91

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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.