Finding the Fourth Proportional to 18,380,022.30, 27,578,890.80 and 12,977,038.80
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Solution
The fourth proportional to 18,380,022.30, 27,578,890.80 and 12,977,038.80 is: 19,471,811.85
Step by Step Solution
- Step 1: Write the proportion equation
18,380,022.30 : 27,578,890.80 = 12,977,038.80 : x - Step 2: Convert to fraction form
18,380,022.30/27,578,890.80 = 12,977,038.80/x - Step 3: Cross multiply
18,380,022.30x = 27,578,890.80 × 12,977,038.80 - Step 4: Simplify right side
18,380,022.30x = 357,892,335,972,563.06 - Step 5: Solve for x
x = 357,892,335,972,563.06/18,380,022.30 - Step 6: Final answer
x = 19,471,811.85
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.