Finding the Fourth Proportional to 13,121,235.70, 18,107,312.97 and 7,320,017.45
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Solution
The fourth proportional to 13,121,235.70, 18,107,312.97 and 7,320,017.45 is: 10,101,628.39
Step by Step Solution
- Step 1: Write the proportion equation
13,121,235.70 : 18,107,312.97 = 7,320,017.45 : x - Step 2: Convert to fraction form
13,121,235.70/18,107,312.97 = 7,320,017.45/x - Step 3: Cross multiply
13,121,235.70x = 18,107,312.97 × 7,320,017.45 - Step 4: Simplify right side
13,121,235.70x = 132,545,846,985,729.66 - Step 5: Solve for x
x = 132,545,846,985,729.66/13,121,235.70 - Step 6: Final answer
x = 10,101,628.39
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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.