Finding the Fourth Proportional to 15,728,783.21, 21,704,336.39 and 8,758,934.09
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Solution
The fourth proportional to 15,728,783.21, 21,704,336.39 and 8,758,934.09 is: 12,086,558.09
Step by Step Solution
- Step 1: Write the proportion equation
15,728,783.21 : 21,704,336.39 = 8,758,934.09 : x - Step 2: Convert to fraction form
15,728,783.21/21,704,336.39 = 8,758,934.09/x - Step 3: Cross multiply
15,728,783.21x = 21,704,336.39 × 8,758,934.09 - Step 4: Simplify right side
15,728,783.21x = 190,106,851,907,198.53 - Step 5: Solve for x
x = 190,106,851,907,198.53/15,728,783.21 - Step 6: Final answer
x = 12,086,558.09
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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.