Finding the Fourth Proportional to 21,139,274.40, 29,172,580.88 and 11,973,813.92
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Solution
The fourth proportional to 21,139,274.40, 29,172,580.88 and 11,973,813.92 is: 16,524,079.70
Step by Step Solution
- Step 1: Write the proportion equation
21,139,274.40 : 29,172,580.88 = 11,973,813.92 : x - Step 2: Convert to fraction form
21,139,274.40/29,172,580.88 = 11,973,813.92/x - Step 3: Cross multiply
21,139,274.40x = 29,172,580.88 × 11,973,813.92 - Step 4: Simplify right side
21,139,274.40x = 349,307,055,023,269.81 - Step 5: Solve for x
x = 349,307,055,023,269.81/21,139,274.40 - Step 6: Final answer
x = 16,524,079.70
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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.