Finding the Fourth Proportional to 13,420,455.21, 18,520,752.51 and 7,619,776.70
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Solution
The fourth proportional to 13,420,455.21, 18,520,752.51 and 7,619,776.70 is: 10,515,589.53
Step by Step Solution
- Step 1: Write the proportion equation
13,420,455.21 : 18,520,752.51 = 7,619,776.70 : x - Step 2: Convert to fraction form
13,420,455.21/18,520,752.51 = 7,619,776.70/x - Step 3: Cross multiply
13,420,455.21x = 18,520,752.51 × 7,619,776.70 - Step 4: Simplify right side
13,420,455.21x = 141,123,998,349,560.78 - Step 5: Solve for x
x = 141,123,998,349,560.78/13,420,455.21 - Step 6: Final answer
x = 10,515,589.53
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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.