Finding the Fourth Proportional to 18,689,071.20, 27,977,619.60 and 11,112,136.80
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Solution
The fourth proportional to 18,689,071.20, 27,977,619.60 and 11,112,136.80 is: 16,634,916.36
Step by Step Solution
- Step 1: Write the proportion equation
18,689,071.20 : 27,977,619.60 = 11,112,136.80 : x - Step 2: Convert to fraction form
18,689,071.20/27,977,619.60 = 11,112,136.80/x - Step 3: Cross multiply
18,689,071.20x = 27,977,619.60 × 11,112,136.80 - Step 4: Simplify right side
18,689,071.20x = 310,891,136,333,561.31 - Step 5: Solve for x
x = 310,891,136,333,561.31/18,689,071.20 - Step 6: Final answer
x = 16,634,916.36
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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.