Finding the Fourth Proportional to 15,306,069.78, 21,122,375.12 and 8,430,551.84
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Solution
The fourth proportional to 15,306,069.78, 21,122,375.12 and 8,430,551.84 is: 11,634,160.89
Step by Step Solution
- Step 1: Write the proportion equation
15,306,069.78 : 21,122,375.12 = 8,430,551.84 : x - Step 2: Convert to fraction form
15,306,069.78/21,122,375.12 = 8,430,551.84/x - Step 3: Cross multiply
15,306,069.78x = 21,122,375.12 × 8,430,551.84 - Step 4: Simplify right side
15,306,069.78x = 178,073,278,443,739.38 - Step 5: Solve for x
x = 178,073,278,443,739.38/15,306,069.78 - Step 6: Final answer
x = 11,634,160.89
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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.