diff --git a/changelog/fix_a_false_positive_for_lint_number_conversion.md b/changelog/fix_a_false_positive_for_lint_number_conversion.md
new file mode 100644
index 00000000000..bc8283bffdb
--- /dev/null
+++ b/changelog/fix_a_false_positive_for_lint_number_conversion.md
@@ -0,0 +1 @@
+* [#9757](https://github.com/rubocop/rubocop/pull/9757): Fix a false positive for `Lint/NumberConversion` when `:to_f` is one of multiple method arguments. ([@koic][])
diff --git a/lib/rubocop/cop/lint/number_conversion.rb b/lib/rubocop/cop/lint/number_conversion.rb
index 0aa4c525305..9a092316864 100644
--- a/lib/rubocop/cop/lint/number_conversion.rb
+++ b/lib/rubocop/cop/lint/number_conversion.rb
@@ -97,7 +97,7 @@ def handle_conversion_method(node)
 
         def handle_as_symbol(node)
           to_method_symbol(node) do |receiver, sym_node, to_method|
-            next if receiver.nil?
+            next if receiver.nil? || !node.arguments.one?
 
             message = format(
               MSG,
diff --git a/spec/rubocop/cop/lint/number_conversion_spec.rb b/spec/rubocop/cop/lint/number_conversion_spec.rb
index 1932f38a22b..1c6a7dae320 100644
--- a/spec/rubocop/cop/lint/number_conversion_spec.rb
+++ b/spec/rubocop/cop/lint/number_conversion_spec.rb
@@ -121,6 +121,12 @@
         to_i
       RUBY
     end
+
+    it 'when `:to_f` is one of multiple method arguments' do
+      expect_no_offenses(<<~RUBY)
+        delegate :to_f, to: :description, allow_nil: true
+      RUBY
+    end
   end
 
   context 'to_method in symbol form' do