Finding the Fourth Proportional to 21,032,326.40, 31,560,931.20 and 15,338,220.80
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Solution
The fourth proportional to 21,032,326.40, 31,560,931.20 and 15,338,220.80 is: 23,016,404.47
Step by Step Solution
- Step 1: Write the proportion equation
21,032,326.40 : 31,560,931.20 = 15,338,220.80 : x - Step 2: Convert to fraction form
21,032,326.40/31,560,931.20 = 15,338,220.80/x - Step 3: Cross multiply
21,032,326.40x = 31,560,931.20 × 15,338,220.80 - Step 4: Simplify right side
21,032,326.40x = 484,088,531,399,209 - Step 5: Solve for x
x = 484,088,531,399,209/21,032,326.40 - Step 6: Final answer
x = 23,016,404.47
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.