What's the difference between Fourth and Fifth normal form? | SQL Server Interview Questions

Note: There is huge similarity between Fourth and Fifth normal form i.e. they address the problem of "Multi- Valued facts ".
"Fifth normal form" multi-valued facts are interlinked and "Fourth normal form" values are independent. For instance in the above two questions "Supplier/Product" and "Supplier/Location" are not linked. While in fifth form the "Dealer/Product/Companies" are completely linked.