Finding the Fourth Proportional to 13,215,153.99, 18,236,919.16 and 7,334,790.65
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Solution
The fourth proportional to 13,215,153.99, 18,236,919.16 and 7,334,790.65 is: 10,122,014.79
Step by Step Solution
- Step 1: Write the proportion equation
13,215,153.99 : 18,236,919.16 = 7,334,790.65 : x - Step 2: Convert to fraction form
13,215,153.99/18,236,919.16 = 7,334,790.65/x - Step 3: Cross multiply
13,215,153.99x = 18,236,919.16 × 7,334,790.65 - Step 4: Simplify right side
13,215,153.99x = 133,763,984,139,573.86 - Step 5: Solve for x
x = 133,763,984,139,573.86/13,215,153.99 - Step 6: Final answer
x = 10,122,014.79
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1.5x scale
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.