Finding the Fourth Proportional to 20,429,553.84, 28,193,097.09 and 11,137,129.35
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Solution
The fourth proportional to 20,429,553.84, 28,193,097.09 and 11,137,129.35 is: 15,369,409.02
Step by Step Solution
- Step 1: Write the proportion equation
20,429,553.84 : 28,193,097.09 = 11,137,129.35 : x - Step 2: Convert to fraction form
20,429,553.84/28,193,097.09 = 11,137,129.35/x - Step 3: Cross multiply
20,429,553.84x = 28,193,097.09 × 11,137,129.35 - Step 4: Simplify right side
20,429,553.84x = 313,990,169,068,438.56 - Step 5: Solve for x
x = 313,990,169,068,438.56/20,429,553.84 - Step 6: Final answer
x = 15,369,409.02
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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.