Finding the Fourth Proportional to 20,937,825.12, 28,916,226.99 and 18,655,428.18
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Solution
The fourth proportional to 20,937,825.12, 28,916,226.99 and 18,655,428.18 is: 25,764,117.94
Step by Step Solution
- Step 1: Write the proportion equation
20,937,825.12 : 28,916,226.99 = 18,655,428.18 : x - Step 2: Convert to fraction form
20,937,825.12/28,916,226.99 = 18,655,428.18/x - Step 3: Cross multiply
20,937,825.12x = 28,916,226.99 × 18,655,428.18 - Step 4: Simplify right side
20,937,825.12x = 539,444,595,848,522.56 - Step 5: Solve for x
x = 539,444,595,848,522.56/20,937,825.12 - Step 6: Final answer
x = 25,764,117.94
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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.