Finding the Fourth Proportional to 13,351,915.36, 18,425,643.24 and 7,240,348.72
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Solution
The fourth proportional to 13,351,915.36, 18,425,643.24 and 7,240,348.72 is: 9,991,681.26
Step by Step Solution
- Step 1: Write the proportion equation
13,351,915.36 : 18,425,643.24 = 7,240,348.72 : x - Step 2: Convert to fraction form
13,351,915.36/18,425,643.24 = 7,240,348.72/x - Step 3: Cross multiply
13,351,915.36x = 18,425,643.24 × 7,240,348.72 - Step 4: Simplify right side
13,351,915.36x = 133,408,082,447,910.64 - Step 5: Solve for x
x = 133,408,082,447,910.64/13,351,915.36 - Step 6: Final answer
x = 9,991,681.26
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1.5x scale
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.