Finding the Fourth Proportional to 7,128,350.10, 10,668,905.55 and 6,561,479.70
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Solution
The fourth proportional to 7,128,350.10, 10,668,905.55 and 6,561,479.70 is: 9,820,478.26
Step by Step Solution
- Step 1: Write the proportion equation
7,128,350.10 : 10,668,905.55 = 6,561,479.70 : x - Step 2: Convert to fraction form
7,128,350.10/10,668,905.55 = 6,561,479.70/x - Step 3: Cross multiply
7,128,350.10x = 10,668,905.55 × 6,561,479.70 - Step 4: Simplify right side
7,128,350.10x = 70,003,807,187,542.34 - Step 5: Solve for x
x = 70,003,807,187,542.34/7,128,350.10 - Step 6: Final answer
x = 9,820,478.26
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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.