Finding the Fourth Proportional to 13,121,198.56, 18,107,261.79 and 7,319,980.28
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Solution
The fourth proportional to 13,121,198.56, 18,107,261.79 and 7,319,980.28 is: 10,101,577.13
Step by Step Solution
- Step 1: Write the proportion equation
13,121,198.56 : 18,107,261.79 = 7,319,980.28 : x - Step 2: Convert to fraction form
13,121,198.56/18,107,261.79 = 7,319,980.28/x - Step 3: Cross multiply
13,121,198.56x = 18,107,261.79 × 7,319,980.28 - Step 4: Simplify right side
13,121,198.56x = 132,544,799,184,737.28 - Step 5: Solve for x
x = 132,544,799,184,737.28/13,121,198.56 - Step 6: Final answer
x = 10,101,577.13
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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.