Finding the Fourth Proportional to 21,692,838.12, 29,933,936.21 and 12,990,786.99
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Solution
The fourth proportional to 21,692,838.12, 29,933,936.21 and 12,990,786.99 is: 17,925,980.31
Step by Step Solution
- Step 1: Write the proportion equation
21,692,838.12 : 29,933,936.21 = 12,990,786.99 : x - Step 2: Convert to fraction form
21,692,838.12/29,933,936.21 = 12,990,786.99/x - Step 3: Cross multiply
21,692,838.12x = 29,933,936.21 × 12,990,786.99 - Step 4: Simplify right side
21,692,838.12x = 388,865,389,076,357.94 - Step 5: Solve for x
x = 388,865,389,076,357.94/21,692,838.12 - Step 6: Final answer
x = 17,925,980.31
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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.