Finding the Fourth Proportional to 18,690,682.70, 28,038,988.35 and 7,908,063.75
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Solution
The fourth proportional to 18,690,682.70, 28,038,988.35 and 7,908,063.75 is: 11,863,349.82
Step by Step Solution
- Step 1: Write the proportion equation
18,690,682.70 : 28,038,988.35 = 7,908,063.75 : x - Step 2: Convert to fraction form
18,690,682.70/28,038,988.35 = 7,908,063.75/x - Step 3: Cross multiply
18,690,682.70x = 28,038,988.35 × 7,908,063.75 - Step 4: Simplify right side
18,690,682.70x = 221,734,107,357,307.31 - Step 5: Solve for x
x = 221,734,107,357,307.31/18,690,682.70 - Step 6: Final answer
x = 11,863,349.82
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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.