Betty and Lois have already invested $12,450 and $16,600 respectively. If Betty invests another $6,000 what amount should Lois contribute to maintain their investments in the same ratio?

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Initially, the ratio of Betty's to Lois's investment is 12,450:16,600. After Betty invests another $6,000, her total investment becomes $18,450. To maintain the same ratio, Lois's investment should be 18,450: x = 12,450:16,600. Solving for x gives $24,600. Since Lois has already invested $16,600, she needs to invest an additional $8,000 to reach $24,600.

Betty and Lois Have Already Invested $12,450 and $16,600 Respectively