Finding the Fourth Proportional to 20,958,913.44, 28,920,986.64 and 11,791,401.12
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Solution
The fourth proportional to 20,958,913.44, 28,920,986.64 and 11,791,401.12 is: 16,270,831.75
Step by Step Solution
- Step 1: Write the proportion equation
20,958,913.44 : 28,920,986.64 = 11,791,401.12 : x - Step 2: Convert to fraction form
20,958,913.44/28,920,986.64 = 11,791,401.12/x - Step 3: Cross multiply
20,958,913.44x = 28,920,986.64 × 11,791,401.12 - Step 4: Simplify right side
20,958,913.44x = 341,018,954,258,401 - Step 5: Solve for x
x = 341,018,954,258,401/20,958,913.44 - Step 6: Final answer
x = 16,270,831.75
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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.