Finding the Fourth Proportional to 18,806,387.40, 28,218,912.30 and 7,447,206.60
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Solution
The fourth proportional to 18,806,387.40, 28,218,912.30 and 7,447,206.60 is: 11,174,504.99
Step by Step Solution
- Step 1: Write the proportion equation
18,806,387.40 : 28,218,912.30 = 7,447,206.60 : x - Step 2: Convert to fraction form
18,806,387.40/28,218,912.30 = 7,447,206.60/x - Step 3: Cross multiply
18,806,387.40x = 28,218,912.30 × 7,447,206.60 - Step 4: Simplify right side
18,806,387.40x = 210,152,069,925,381.19 - Step 5: Solve for x
x = 210,152,069,925,381.19/18,806,387.40 - Step 6: Final answer
x = 11,174,504.99
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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.