Finding the Fourth Proportional to 21,408,384.75, 29,543,559.62 and 12,115,786.11
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Solution
The fourth proportional to 21,408,384.75, 29,543,559.62 and 12,115,786.11 is: 16,719,778.41
Step by Step Solution
- Step 1: Write the proportion equation
21,408,384.75 : 29,543,559.62 = 12,115,786.11 : x - Step 2: Convert to fraction form
21,408,384.75/29,543,559.62 = 12,115,786.11/x - Step 3: Cross multiply
21,408,384.75x = 29,543,559.62 × 12,115,786.11 - Step 4: Simplify right side
21,408,384.75x = 357,943,449,223,373.94 - Step 5: Solve for x
x = 357,943,449,223,373.94/21,408,384.75 - Step 6: Final answer
x = 16,719,778.41
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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.