Finding the Fourth Proportional to 20,906,889,696, 28,851,142,924.80 and 11,391,520,207.68
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Solution
The fourth proportional to 20,906,889,696, 28,851,142,924.80 and 11,391,520,207.68 is: 15,720,099,087.98
Step by Step Solution
- Step 1: Write the proportion equation
20,906,889,696 : 28,851,142,924.80 = 11,391,520,207.68 : x - Step 2: Convert to fraction form
20,906,889,696/28,851,142,924.80 = 11,391,520,207.68/x - Step 3: Cross multiply
20,906,889,696x = 28,851,142,924.80 × 11,391,520,207.68 - Step 4: Simplify right side
20,906,889,696x = 328,658,377,642,523,033,600 - Step 5: Solve for x
x = 328,658,377,642,523,033,600/20,906,889,696 - Step 6: Final answer
x = 15,720,099,087.98
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1.5x scale
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.