Finding the Fourth Proportional to 21,397,642.68, 29,528,731.86 and 11,608,088.72
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Solution
The fourth proportional to 21,397,642.68, 29,528,731.86 and 11,608,088.72 is: 16,019,154.28
Step by Step Solution
- Step 1: Write the proportion equation
21,397,642.68 : 29,528,731.86 = 11,608,088.72 : x - Step 2: Convert to fraction form
21,397,642.68/29,528,731.86 = 11,608,088.72/x - Step 3: Cross multiply
21,397,642.68x = 29,528,731.86 × 11,608,088.72 - Step 4: Simplify right side
21,397,642.68x = 342,772,139,219,970.62 - Step 5: Solve for x
x = 342,772,139,219,970.62/21,397,642.68 - Step 6: Final answer
x = 16,019,154.28
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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.