Finding the Fourth Proportional to 15,305,907.36, 21,122,151.08 and 8,430,389.40
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Solution
The fourth proportional to 15,305,907.36, 21,122,151.08 and 8,430,389.40 is: 11,633,936.78
Step by Step Solution
- Step 1: Write the proportion equation
15,305,907.36 : 21,122,151.08 = 8,430,389.40 : x - Step 2: Convert to fraction form
15,305,907.36/21,122,151.08 = 8,430,389.40/x - Step 3: Cross multiply
15,305,907.36x = 21,122,151.08 × 8,430,389.40 - Step 4: Simplify right side
15,305,907.36x = 178,067,958,570,030.53 - Step 5: Solve for x
x = 178,067,958,570,030.53/15,305,907.36 - Step 6: Final answer
x = 11,633,936.78
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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.