Finding the Fourth Proportional to 13,129,109.36, 18,116,499.84 and 7,328,135.60
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Solution
The fourth proportional to 13,129,109.36, 18,116,499.84 and 7,328,135.60 is: 10,111,894.40
Step by Step Solution
- Step 1: Write the proportion equation
13,129,109.36 : 18,116,499.84 = 7,328,135.60 : x - Step 2: Convert to fraction form
13,129,109.36/18,116,499.84 = 7,328,135.60/x - Step 3: Cross multiply
13,129,109.36x = 18,116,499.84 × 7,328,135.60 - Step 4: Simplify right side
13,129,109.36x = 132,760,167,334,315.80 - Step 5: Solve for x
x = 132,760,167,334,315.80/13,129,109.36 - Step 6: Final answer
x = 10,111,894.40
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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.