Finding the Fourth Proportional to 20,515,866.90, 28,309,122.97 and 11,696,455.87
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Solution
The fourth proportional to 20,515,866.90, 28,309,122.97 and 11,696,455.87 is: 16,139,527.96
Step by Step Solution
- Step 1: Write the proportion equation
20,515,866.90 : 28,309,122.97 = 11,696,455.87 : x - Step 2: Convert to fraction form
20,515,866.90/28,309,122.97 = 11,696,455.87/x - Step 3: Cross multiply
20,515,866.90x = 28,309,122.97 × 11,696,455.87 - Step 4: Simplify right side
20,515,866.90x = 331,116,407,537,008.31 - Step 5: Solve for x
x = 331,116,407,537,008.31/20,515,866.90 - Step 6: Final answer
x = 16,139,527.96
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.