Finding the Fourth Proportional to 21,330,609.88, 29,427,865.79 and 12,388,197.74
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Solution
The fourth proportional to 21,330,609.88, 29,427,865.79 and 12,388,197.74 is: 17,090,848.44
Step by Step Solution
- Step 1: Write the proportion equation
21,330,609.88 : 29,427,865.79 = 12,388,197.74 : x - Step 2: Convert to fraction form
21,330,609.88/29,427,865.79 = 12,388,197.74/x - Step 3: Cross multiply
21,330,609.88x = 29,427,865.79 × 12,388,197.74 - Step 4: Simplify right side
21,330,609.88x = 364,558,220,450,920.81 - Step 5: Solve for x
x = 364,558,220,450,920.81/21,330,609.88 - Step 6: Final answer
x = 17,090,848.44
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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.