Finding the Fourth Proportional to 10,657,642.88, 15,990,478.68 and 6,400,778.96
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Solution
The fourth proportional to 10,657,642.88, 15,990,478.68 and 6,400,778.96 is: 9,603,579.39
Step by Step Solution
- Step 1: Write the proportion equation
10,657,642.88 : 15,990,478.68 = 6,400,778.96 : x - Step 2: Convert to fraction form
10,657,642.88/15,990,478.68 = 6,400,778.96/x - Step 3: Cross multiply
10,657,642.88x = 15,990,478.68 × 6,400,778.96 - Step 4: Simplify right side
10,657,642.88x = 102,351,519,495,272.56 - Step 5: Solve for x
x = 102,351,519,495,272.56/10,657,642.88 - Step 6: Final answer
x = 9,603,579.39
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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.