Finding the Fourth Proportional to 20,473,979.99, 28,241,116.16 and 15,568,447.86
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Solution
The fourth proportional to 20,473,979.99, 28,241,116.16 and 15,568,447.86 is: 21,474,590.90
Step by Step Solution
- Step 1: Write the proportion equation
20,473,979.99 : 28,241,116.16 = 15,568,447.86 : x - Step 2: Convert to fraction form
20,473,979.99/28,241,116.16 = 15,568,447.86/x - Step 3: Cross multiply
20,473,979.99x = 28,241,116.16 × 15,568,447.86 - Step 4: Simplify right side
20,473,979.99x = 439,670,344,367,321.19 - Step 5: Solve for x
x = 439,670,344,367,321.19/20,473,979.99 - Step 6: Final answer
x = 21,474,590.90
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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.