Finding the Fourth Proportional to 15,305,872.81, 21,122,103.73 and 8,430,355.21
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Solution
The fourth proportional to 15,305,872.81, 21,122,103.73 and 8,430,355.21 is: 11,633,889.78
Step by Step Solution
- Step 1: Write the proportion equation
15,305,872.81 : 21,122,103.73 = 8,430,355.21 : x - Step 2: Convert to fraction form
15,305,872.81/21,122,103.73 = 8,430,355.21/x - Step 3: Cross multiply
15,305,872.81x = 21,122,103.73 × 8,430,355.21 - Step 4: Simplify right side
15,305,872.81x = 178,066,837,226,365.97 - Step 5: Solve for x
x = 178,066,837,226,365.97/15,305,872.81 - Step 6: Final answer
x = 11,633,889.78
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.