Finding the Fourth Proportional to 7,781.85, 11,666.84 and 3,888.99
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Solution
The fourth proportional to 7,781.85, 11,666.84 and 3,888.99 is: 5,830.52
Step by Step Solution
- Step 1: Write the proportion equation
7,781.85 : 11,666.84 = 3,888.99 : x - Step 2: Convert to fraction form
7,781.85/11,666.84 = 3,888.99/x - Step 3: Cross multiply
7,781.85x = 11,666.84 × 3,888.99 - Step 4: Simplify right side
7,781.85x = 45,372,204.65 - Step 5: Solve for x
x = 45,372,204.65/7,781.85 - Step 6: Final answer
x = 5,830.52
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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.