Finding the Fourth Proportional to 20,506,918.44, 28,298,987.58 and 11,339,247.72
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Solution
The fourth proportional to 20,506,918.44, 28,298,987.58 and 11,339,247.72 is: 15,647,852.28
Step by Step Solution
- Step 1: Write the proportion equation
20,506,918.44 : 28,298,987.58 = 11,339,247.72 : x - Step 2: Convert to fraction form
20,506,918.44/28,298,987.58 = 11,339,247.72/x - Step 3: Cross multiply
20,506,918.44x = 28,298,987.58 × 11,339,247.72 - Step 4: Simplify right side
20,506,918.44x = 320,889,230,394,823.31 - Step 5: Solve for x
x = 320,889,230,394,823.31/20,506,918.44 - Step 6: Final answer
x = 15,647,852.28
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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.