Finding the Fourth Proportional to 20,315,219.96, 28,035,811.86 and 11,148,190.76
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Solution
The fourth proportional to 20,315,219.96, 28,035,811.86 and 11,148,190.76 is: 15,384,946.82
Step by Step Solution
- Step 1: Write the proportion equation
20,315,219.96 : 28,035,811.86 = 11,148,190.76 : x - Step 2: Convert to fraction form
20,315,219.96/28,035,811.86 = 11,148,190.76/x - Step 3: Cross multiply
20,315,219.96x = 28,035,811.86 × 11,148,190.76 - Step 4: Simplify right side
20,315,219.96x = 312,548,578,726,750.38 - Step 5: Solve for x
x = 312,548,578,726,750.38/20,315,219.96 - Step 6: Final answer
x = 15,384,946.82
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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.