Finding the Fourth Proportional to 20,868,992.78, 28,794,897.44 and 12,048,291.21
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Solution
The fourth proportional to 20,868,992.78, 28,794,897.44 and 12,048,291.21 is: 16,624,152.07
Step by Step Solution
- Step 1: Write the proportion equation
20,868,992.78 : 28,794,897.44 = 12,048,291.21 : x - Step 2: Convert to fraction form
20,868,992.78/28,794,897.44 = 12,048,291.21/x - Step 3: Cross multiply
20,868,992.78x = 28,794,897.44 × 12,048,291.21 - Step 4: Simplify right side
20,868,992.78x = 346,929,309,575,229.06 - Step 5: Solve for x
x = 346,929,309,575,229.06/20,868,992.78 - Step 6: Final answer
x = 16,624,152.07
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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.