Finding the Fourth Proportional to 20,101,806.21, 30,156,071.84 and 15,783,681.63
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Solution
The fourth proportional to 20,101,806.21, 30,156,071.84 and 15,783,681.63 is: 23,678,162.65
Step by Step Solution
- Step 1: Write the proportion equation
20,101,806.21 : 30,156,071.84 = 15,783,681.63 : x - Step 2: Convert to fraction form
20,101,806.21/30,156,071.84 = 15,783,681.63/x - Step 3: Cross multiply
20,101,806.21x = 30,156,071.84 × 15,783,681.63 - Step 4: Simplify right side
20,101,806.21x = 475,973,837,055,049.94 - Step 5: Solve for x
x = 475,973,837,055,049.94/20,101,806.21 - Step 6: Final answer
x = 23,678,162.65
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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.