Finding the Fourth Proportional to 21,153,436.70, 29,197,796.09 and 12,456,653.85
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Solution
The fourth proportional to 21,153,436.70, 29,197,796.09 and 12,456,653.85 is: 17,193,747.01
Step by Step Solution
- Step 1: Write the proportion equation
21,153,436.70 : 29,197,796.09 = 12,456,653.85 : x - Step 2: Convert to fraction form
21,153,436.70/29,197,796.09 = 12,456,653.85/x - Step 3: Cross multiply
21,153,436.70x = 29,197,796.09 × 12,456,653.85 - Step 4: Simplify right side
21,153,436.70x = 363,706,839,076,013.44 - Step 5: Solve for x
x = 363,706,839,076,013.44/21,153,436.70 - Step 6: Final answer
x = 17,193,747.01
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1.5x scale
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.