Finding the Fourth Proportional to 21,341,983.68, 29,422,668.15 and 13,497,586.20
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Solution
The fourth proportional to 21,341,983.68, 29,422,668.15 and 13,497,586.20 is: 18,608,157.78
Step by Step Solution
- Step 1: Write the proportion equation
21,341,983.68 : 29,422,668.15 = 13,497,586.20 : x - Step 2: Convert to fraction form
21,341,983.68/29,422,668.15 = 13,497,586.20/x - Step 3: Cross multiply
21,341,983.68x = 29,422,668.15 × 13,497,586.20 - Step 4: Simplify right side
21,341,983.68x = 397,134,999,588,619.50 - Step 5: Solve for x
x = 397,134,999,588,619.50/21,341,983.68 - Step 6: Final answer
x = 18,608,157.78
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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.