Finding the Fourth Proportional to 15,979,919.40, 22,052,289.54 and 8,637,728.46
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Solution
The fourth proportional to 15,979,919.40, 22,052,289.54 and 8,637,728.46 is: 11,920,065.69
Step by Step Solution
- Step 1: Write the proportion equation
15,979,919.40 : 22,052,289.54 = 8,637,728.46 : x - Step 2: Convert to fraction form
15,979,919.40/22,052,289.54 = 8,637,728.46/x - Step 3: Cross multiply
15,979,919.40x = 22,052,289.54 × 8,637,728.46 - Step 4: Simplify right side
15,979,919.40x = 190,481,688,967,818.31 - Step 5: Solve for x
x = 190,481,688,967,818.31/15,979,919.40 - Step 6: Final answer
x = 11,920,065.69
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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.