Finding the Fourth Proportional to 20,731,447.80, 28,609,202.70 and 11,439,101.88
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Solution
The fourth proportional to 20,731,447.80, 28,609,202.70 and 11,439,101.88 is: 15,785,852.85
Step by Step Solution
- Step 1: Write the proportion equation
20,731,447.80 : 28,609,202.70 = 11,439,101.88 : x - Step 2: Convert to fraction form
20,731,447.80/28,609,202.70 = 11,439,101.88/x - Step 3: Cross multiply
20,731,447.80x = 28,609,202.70 × 11,439,101.88 - Step 4: Simplify right side
20,731,447.80x = 327,263,584,390,871.06 - Step 5: Solve for x
x = 327,263,584,390,871.06/20,731,447.80 - Step 6: Final answer
x = 15,785,852.85
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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.