Finding the Fourth Proportional to 15,386,578.39, 21,122,288.48 and 13,207,338.19
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Solution
The fourth proportional to 15,386,578.39, 21,122,288.48 and 13,207,338.19 is: 18,130,685.08
Step by Step Solution
- Step 1: Write the proportion equation
15,386,578.39 : 21,122,288.48 = 13,207,338.19 : x - Step 2: Convert to fraction form
15,386,578.39/21,122,288.48 = 13,207,338.19/x - Step 3: Cross multiply
15,386,578.39x = 21,122,288.48 × 13,207,338.19 - Step 4: Simplify right side
15,386,578.39x = 278,969,207,302,101.03 - Step 5: Solve for x
x = 278,969,207,302,101.03/15,386,578.39 - Step 6: Final answer
x = 18,130,685.08
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Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.