Finding the Fourth Proportional to 20,406,682.34, 28,161,221.63 and 11,239,325.09
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Solution
The fourth proportional to 20,406,682.34, 28,161,221.63 and 11,239,325.09 is: 15,510,268.62
Step by Step Solution
- Step 1: Write the proportion equation
20,406,682.34 : 28,161,221.63 = 11,239,325.09 : x - Step 2: Convert to fraction form
20,406,682.34/28,161,221.63 = 11,239,325.09/x - Step 3: Cross multiply
20,406,682.34x = 28,161,221.63 × 11,239,325.09 - Step 4: Simplify right side
20,406,682.34x = 316,513,124,634,107 - Step 5: Solve for x
x = 316,513,124,634,107/20,406,682.34 - Step 6: Final answer
x = 15,510,268.62
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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.