Finding the Fourth Proportional to 20,776,857.60, 31,165,286.40 and 13,124,107.20
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Solution
The fourth proportional to 20,776,857.60, 31,165,286.40 and 13,124,107.20 is: 19,686,160.80
Step by Step Solution
- Step 1: Write the proportion equation
20,776,857.60 : 31,165,286.40 = 13,124,107.20 : x - Step 2: Convert to fraction form
20,776,857.60/31,165,286.40 = 13,124,107.20/x - Step 3: Cross multiply
20,776,857.60x = 31,165,286.40 × 13,124,107.20 - Step 4: Simplify right side
20,776,857.60x = 409,016,559,632,302.06 - Step 5: Solve for x
x = 409,016,559,632,302.06/20,776,857.60 - Step 6: Final answer
x = 19,686,160.80
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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.