Finding the Fourth Proportional to 13,290,257.42, 18,340,562.58 and 7,178,685.92
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Solution
The fourth proportional to 13,290,257.42, 18,340,562.58 and 7,178,685.92 is: 9,906,590.53
Step by Step Solution
- Step 1: Write the proportion equation
13,290,257.42 : 18,340,562.58 = 7,178,685.92 : x - Step 2: Convert to fraction form
13,290,257.42/18,340,562.58 = 7,178,685.92/x - Step 3: Cross multiply
13,290,257.42x = 18,340,562.58 × 7,178,685.92 - Step 4: Simplify right side
13,290,257.42x = 131,661,138,357,924.86 - Step 5: Solve for x
x = 131,661,138,357,924.86/13,290,257.42 - Step 6: Final answer
x = 9,906,590.53
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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.