Finding the Fourth Proportional to 20,788,982.20, 31,136,234.10 and 13,136,231.80
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Solution
The fourth proportional to 20,788,982.20, 31,136,234.10 and 13,136,231.80 is: 19,674,497.99
Step by Step Solution
- Step 1: Write the proportion equation
20,788,982.20 : 31,136,234.10 = 13,136,231.80 : x - Step 2: Convert to fraction form
20,788,982.20/31,136,234.10 = 13,136,231.80/x - Step 3: Cross multiply
20,788,982.20x = 31,136,234.10 × 13,136,231.80 - Step 4: Simplify right side
20,788,982.20x = 409,012,788,516,664.44 - Step 5: Solve for x
x = 409,012,788,516,664.44/20,788,982.20 - Step 6: Final answer
x = 19,674,497.99
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.