Finding the Fourth Proportional to 10,290,330.99, 15,421,781.21 and 5,431,495.28
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Solution
The fourth proportional to 10,290,330.99, 15,421,781.21 and 5,431,495.28 is: 8,140,003.64
Step by Step Solution
- Step 1: Write the proportion equation
10,290,330.99 : 15,421,781.21 = 5,431,495.28 : x - Step 2: Convert to fraction form
10,290,330.99/15,421,781.21 = 5,431,495.28/x - Step 3: Cross multiply
10,290,330.99x = 15,421,781.21 × 5,431,495.28 - Step 4: Simplify right side
10,290,330.99x = 83,763,331,747,041.31 - Step 5: Solve for x
x = 83,763,331,747,041.31/10,290,330.99 - Step 6: Final answer
x = 8,140,003.64
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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.