Finding the Fourth Proportional to 19,403,979.40, 29,105,969.10 and 13,357,361.80
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Solution
The fourth proportional to 19,403,979.40, 29,105,969.10 and 13,357,361.80 is: 20,036,042.70
Step by Step Solution
- Step 1: Write the proportion equation
19,403,979.40 : 29,105,969.10 = 13,357,361.80 : x - Step 2: Convert to fraction form
19,403,979.40/29,105,969.10 = 13,357,361.80/x - Step 3: Cross multiply
19,403,979.40x = 29,105,969.10 × 13,357,361.80 - Step 4: Simplify right side
19,403,979.40x = 388,778,959,808,320.44 - Step 5: Solve for x
x = 388,778,959,808,320.44/19,403,979.40 - Step 6: Final answer
x = 20,036,042.70
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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.