Finding the Fourth Proportional to 20,618,528.51, 28,451,904.45 and 11,917,264.70
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Solution
The fourth proportional to 20,618,528.51, 28,451,904.45 and 11,917,264.70 is: 16,444,862.99
Step by Step Solution
- Step 1: Write the proportion equation
20,618,528.51 : 28,451,904.45 = 11,917,264.70 : x - Step 2: Convert to fraction form
20,618,528.51/28,451,904.45 = 11,917,264.70/x - Step 3: Cross multiply
20,618,528.51x = 28,451,904.45 × 11,917,264.70 - Step 4: Simplify right side
20,618,528.51x = 339,068,876,407,498.38 - Step 5: Solve for x
x = 339,068,876,407,498.38/20,618,528.51 - Step 6: Final answer
x = 16,444,862.99
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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.