Finding the Fourth Proportional to 15,320,862.19, 21,142,779.90 and 8,351,553.07
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Solution
The fourth proportional to 15,320,862.19, 21,142,779.90 and 8,351,553.07 is: 11,525,137.83
Step by Step Solution
- Step 1: Write the proportion equation
15,320,862.19 : 21,142,779.90 = 8,351,553.07 : x - Step 2: Convert to fraction form
15,320,862.19/21,142,779.90 = 8,351,553.07/x - Step 3: Cross multiply
15,320,862.19x = 21,142,779.90 × 8,351,553.07 - Step 4: Simplify right side
15,320,862.19x = 176,575,048,382,179.28 - Step 5: Solve for x
x = 176,575,048,382,179.28/15,320,862.19 - Step 6: Final answer
x = 11,525,137.83
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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.