What is the rule for positioning a ladder's base relative to its height?

The correct principle for positioning a ladder is known as the 4 to 1 rule. This guideline suggests that for every four feet of ladder height, the base of the ladder should be positioned one foot away from the wall or surface it leans against. This rule is critical for maintaining stability and safety while using a ladder.

When the ladder is set up according to the 4 to 1 rule, the angle created helps prevent the ladder from tipping over or slipping, which can lead to accidents. A properly positioned ladder also allows for easier access to the work area while ensuring the user maintains a safe and secure stance.

In practice, this rule is widely accepted in various industries and is essential for promoting safe ladder use, particularly in construction and maintenance scenarios. The other options presented do not provide a scientifically backed guideline for ladder safety and positioning.