Finding the Fourth Proportional to 21,515,823.40, 29,690,971.93 and 11,726,057.80
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Solution
The fourth proportional to 21,515,823.40, 29,690,971.93 and 11,726,057.80 is: 16,181,488.69
Step by Step Solution
- Step 1: Write the proportion equation
21,515,823.40 : 29,690,971.93 = 11,726,057.80 : x - Step 2: Convert to fraction form
21,515,823.40/29,690,971.93 = 11,726,057.80/x - Step 3: Cross multiply
21,515,823.40x = 29,690,971.93 × 11,726,057.80 - Step 4: Simplify right side
21,515,823.40x = 348,158,052,907,090.81 - Step 5: Solve for x
x = 348,158,052,907,090.81/21,515,823.40 - Step 6: Final answer
x = 16,181,488.69
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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.