Finding the Fourth Proportional to 13,221,811.17, 18,247,879.80 and 7,420,910.31
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Solution
The fourth proportional to 13,221,811.17, 18,247,879.80 and 7,420,910.31 is: 10,241,855.49
Step by Step Solution
- Step 1: Write the proportion equation
13,221,811.17 : 18,247,879.80 = 7,420,910.31 : x - Step 2: Convert to fraction form
13,221,811.17/18,247,879.80 = 7,420,910.31/x - Step 3: Cross multiply
13,221,811.17x = 18,247,879.80 × 7,420,910.31 - Step 4: Simplify right side
13,221,811.17x = 135,415,879,343,460.73 - Step 5: Solve for x
x = 135,415,879,343,460.73/13,221,811.17 - Step 6: Final answer
x = 10,241,855.49
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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.