Finding the Fourth Proportional to 12,128,389.40, 16,744,730.87 and 7,720,602.08
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Solution
The fourth proportional to 12,128,389.40, 16,744,730.87 and 7,720,602.08 is: 10,659,239.21
Step by Step Solution
- Step 1: Write the proportion equation
12,128,389.40 : 16,744,730.87 = 7,720,602.08 : x - Step 2: Convert to fraction form
12,128,389.40/16,744,730.87 = 7,720,602.08/x - Step 3: Cross multiply
12,128,389.40x = 16,744,730.87 × 7,720,602.08 - Step 4: Simplify right side
12,128,389.40x = 129,279,403,919,540.06 - Step 5: Solve for x
x = 129,279,403,919,540.06/12,128,389.40 - Step 6: Final answer
x = 10,659,239.21
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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.