Finding the Fourth Proportional to 21,918,536.46, 30,251,858.67 and 13,218,125.58
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Solution
The fourth proportional to 21,918,536.46, 30,251,858.67 and 13,218,125.58 is: 18,243,593.39
Step by Step Solution
- Step 1: Write the proportion equation
21,918,536.46 : 30,251,858.67 = 13,218,125.58 : x - Step 2: Convert to fraction form
21,918,536.46/30,251,858.67 = 13,218,125.58/x - Step 3: Cross multiply
21,918,536.46x = 30,251,858.67 × 13,218,125.58 - Step 4: Simplify right side
21,918,536.46x = 399,872,866,928,471.81 - Step 5: Solve for x
x = 399,872,866,928,471.81/21,918,536.46 - Step 6: Final answer
x = 18,243,593.39
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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.