Finding the Fourth Proportional to 20,631,031,759.56, 28,470,920,243.40 and 11,720,849,438.28
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Solution
The fourth proportional to 20,631,031,759.56, 28,470,920,243.40 and 11,720,849,438.28 is: 16,174,826,999.99
Step by Step Solution
- Step 1: Write the proportion equation
20,631,031,759.56 : 28,470,920,243.40 = 11,720,849,438.28 : x - Step 2: Convert to fraction form
20,631,031,759.56/28,470,920,243.40 = 11,720,849,438.28/x - Step 3: Cross multiply
20,631,031,759.56x = 28,470,920,243.40 × 11,720,849,438.28 - Step 4: Simplify right side
20,631,031,759.56x = 333,703,369,542,169,591,808 - Step 5: Solve for x
x = 333,703,369,542,169,591,808/20,631,031,759.56 - Step 6: Final answer
x = 16,174,826,999.99
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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.