Finding the Fourth Proportional to 8,415.64, 11,545.10 and 7,913.08
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Solution
The fourth proportional to 8,415.64, 11,545.10 and 7,913.08 is: 10,855.66
Step by Step Solution
- Step 1: Write the proportion equation
8,415.64 : 11,545.10 = 7,913.08 : x - Step 2: Convert to fraction form
8,415.64/11,545.10 = 7,913.08/x - Step 3: Cross multiply
8,415.64x = 11,545.10 × 7,913.08 - Step 4: Simplify right side
8,415.64x = 91,357,299.91 - Step 5: Solve for x
x = 91,357,299.91/8,415.64 - Step 6: Final answer
x = 10,855.66
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.