Final answer:
The 4th horse mentioned in the question is the Pale Horse from the book of Revelation. Its rider represents Death.
Step-by-step explanation:
The 4th horse mentioned in the question is part of a biblical reference, specifically from the book of Revelation in the New Testament. In the passage, the 4th horse is known as the Pale Horse, and its rider represents Death. This judgment of God is associated with death and destruction.