Finding the Fourth Proportional to 7,903.94, 11,855.91 and 6,990.26
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Solution
The fourth proportional to 7,903.94, 11,855.91 and 6,990.26 is: 10,485.39
Step by Step Solution
- Step 1: Write the proportion equation
7,903.94 : 11,855.91 = 6,990.26 : x - Step 2: Convert to fraction form
7,903.94/11,855.91 = 6,990.26/x - Step 3: Cross multiply
7,903.94x = 11,855.91 × 6,990.26 - Step 4: Simplify right side
7,903.94x = 82,875,893.44 - Step 5: Solve for x
x = 82,875,893.44/7,903.94 - Step 6: Final answer
x = 10,485.39
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Double scale
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Similar ratio
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.