Finding the Fourth Proportional to 21,243,351,572.12, 29,319,663,553.98 and 12,670,328,368.28
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Solution
The fourth proportional to 21,243,351,572.12, 29,319,663,553.98 and 12,670,328,368.28 is: 17,487,342,504.09
Step by Step Solution
- Step 1: Write the proportion equation
21,243,351,572.12 : 29,319,663,553.98 = 12,670,328,368.28 : x - Step 2: Convert to fraction form
21,243,351,572.12/29,319,663,553.98 = 12,670,328,368.28/x - Step 3: Cross multiply
21,243,351,572.12x = 29,319,663,553.98 × 12,670,328,368.28 - Step 4: Simplify right side
21,243,351,572.12x = 371,489,764,876,418,023,424 - Step 5: Solve for x
x = 371,489,764,876,418,023,424/21,243,351,572.12 - Step 6: Final answer
x = 17,487,342,504.09
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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.