There are two measurements. Alcohol by weight and alcohol by volume. Alcohol weighs less than water. So, if you measure by weight you get a number 25% lower than you get if you measure by volume.
Alcohol by weight was used immediately after prohibition ended specifically because the number was lower. Saying a beer had 3.2% alcohol was less scary to the pro-prohibitionists than saying it was 4% alcohol, so that's what people used so that they could squeeze as much alcohol into easily available beer as possible without getting too much push back from the Teetotalers.
But within the alcohol industry alcohol by volume is the measurement used. Pretty much 99%+ of the time. For one, it's much easier to measure. As a home brewer I measure alcohol by volume using a hydrometer and it's very simple. If I were to measure alcohol by weight I'd need much more complicated equipment.
So, just to be clear, "Utah beer" is 4%abv which translates to 3.2%abw. So if you want to compare the alcohol content of "Utah beer" to any other beer use 4% because the other beer will list its alcohol content by volume.