11.
“In the second year of Pekah the son of Remaliah king of Israel began Jotham the son of Uzziah [Azariah] king of Judah to reign” (2 Kings xv, 32).
From the death of Ahaziah to the beginning of Jotham’s reign the following were the reigns of Israel’s kings: Jehoram 12 years, Jehu 28 years, Jehoahaz 17 years, Joash 16 years, Jeroboam 41 years, Zachariah and Shallum 1 year, Menahem 10 years, Pekahiah 2 years, Pekah 2 years. 12 years + 28 years + 17 years + 16 years + 41 years + 1 year + 10 years + 2 years + 2 years = 129 years.
From the death of Jehoshaphat to the beginning of Jotham’s reign the following were the reigns of Judah’s kings: Joram 8 years, Ahaziah 1 year, Athaliah 6 years, Joash 40 years, Amaziah 29 years, Azariah 52 years. 8 years + 1 year + 6 years + 40 years + 29 years + 52 years = 136 years.
If from the death of Ahaziah to the beginning of Jotham’s reign was one hundred and twenty-nine years, and from the death of Jehoshaphat to the beginning of Jotham’s reign was one hundred and thirty-six years, Jehoshaphat therefore died seven years before Ahaziah died.