Finding the Fourth Proportional to 20,386,762.58, 30,590,805.49 and 8,257,507.49
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Solution
The fourth proportional to 20,386,762.58, 30,590,805.49 and 8,257,507.49 is: 12,390,579.65
Step by Step Solution
- Step 1: Write the proportion equation
20,386,762.58 : 30,590,805.49 = 8,257,507.49 : x - Step 2: Convert to fraction form
20,386,762.58/30,590,805.49 = 8,257,507.49/x - Step 3: Cross multiply
20,386,762.58x = 30,590,805.49 × 8,257,507.49 - Step 4: Simplify right side
20,386,762.58x = 252,603,805,458,808.12 - Step 5: Solve for x
x = 252,603,805,458,808.12/20,386,762.58 - Step 6: Final answer
x = 12,390,579.65
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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.