Finding the Fourth Proportional to 13,207,930.80, 19,780,403.40 and 13,207,930.80
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Solution
The fourth proportional to 13,207,930.80, 19,780,403.40 and 13,207,930.80 is: 19,780,403.40
Step by Step Solution
- Step 1: Write the proportion equation
13,207,930.80 : 19,780,403.40 = 13,207,930.80 : x - Step 2: Convert to fraction form
13,207,930.80/19,780,403.40 = 13,207,930.80/x - Step 3: Cross multiply
13,207,930.80x = 19,780,403.40 × 13,207,930.80 - Step 4: Simplify right side
13,207,930.80x = 261,258,199,303,284.72 - Step 5: Solve for x
x = 261,258,199,303,284.72/13,207,930.80 - Step 6: Final answer
x = 19,780,403.40
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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.