Finding the Fourth Proportional to 12,302,912.70, 18,454,369.05 and 5,128,459.20
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Solution
The fourth proportional to 12,302,912.70, 18,454,369.05 and 5,128,459.20 is: 7,692,688.80
Step by Step Solution
- Step 1: Write the proportion equation
12,302,912.70 : 18,454,369.05 = 5,128,459.20 : x - Step 2: Convert to fraction form
12,302,912.70/18,454,369.05 = 5,128,459.20/x - Step 3: Cross multiply
12,302,912.70x = 18,454,369.05 × 5,128,459.20 - Step 4: Simplify right side
12,302,912.70x = 94,642,478,734,667.77 - Step 5: Solve for x
x = 94,642,478,734,667.77/12,302,912.70 - Step 6: Final answer
x = 7,692,688.80
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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.