Finding the Fourth Proportional to 20,430,461.90, 28,194,229.78 and 11,263,432.70
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Solution
The fourth proportional to 20,430,461.90, 28,194,229.78 and 11,263,432.70 is: 15,543,643.17
Step by Step Solution
- Step 1: Write the proportion equation
20,430,461.90 : 28,194,229.78 = 11,263,432.70 : x - Step 2: Convert to fraction form
20,430,461.90/28,194,229.78 = 11,263,432.70/x - Step 3: Cross multiply
20,430,461.90x = 28,194,229.78 × 11,263,432.70 - Step 4: Simplify right side
20,430,461.90x = 317,563,809,655,365.81 - Step 5: Solve for x
x = 317,563,809,655,365.81/20,430,461.90 - Step 6: Final answer
x = 15,543,643.17
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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.