Finding the Fourth Proportional to 19,987,684.40, 29,981,526.60 and 8,620,209.20
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Solution
The fourth proportional to 19,987,684.40, 29,981,526.60 and 8,620,209.20 is: 12,930,313.80
Step by Step Solution
- Step 1: Write the proportion equation
19,987,684.40 : 29,981,526.60 = 8,620,209.20 : x - Step 2: Convert to fraction form
19,987,684.40/29,981,526.60 = 8,620,209.20/x - Step 3: Cross multiply
19,987,684.40x = 29,981,526.60 × 8,620,209.20 - Step 4: Simplify right side
19,987,684.40x = 258,447,031,427,364.72 - Step 5: Solve for x
x = 258,447,031,427,364.72/19,987,684.40 - Step 6: Final answer
x = 12,930,313.80
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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.