Finding the Fourth Proportional to 21,531,115.09, 29,712,985.83 and 12,238,742.09
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Solution
The fourth proportional to 21,531,115.09, 29,712,985.83 and 12,238,742.09 is: 16,889,490.80
Step by Step Solution
- Step 1: Write the proportion equation
21,531,115.09 : 29,712,985.83 = 12,238,742.09 : x - Step 2: Convert to fraction form
21,531,115.09/29,712,985.83 = 12,238,742.09/x - Step 3: Cross multiply
21,531,115.09x = 29,712,985.83 × 12,238,742.09 - Step 4: Simplify right side
21,531,115.09x = 363,649,570,253,508.75 - Step 5: Solve for x
x = 363,649,570,253,508.75/21,531,115.09 - Step 6: Final answer
x = 16,889,490.80
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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.