Finding the Fourth Proportional to 28,543,615.75, 39,390,209.99 and 15,490,871.56
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Solution
The fourth proportional to 28,543,615.75, 39,390,209.99 and 15,490,871.56 is: 21,377,413.75
Step by Step Solution
- Step 1: Write the proportion equation
28,543,615.75 : 39,390,209.99 = 15,490,871.56 : x - Step 2: Convert to fraction form
28,543,615.75/39,390,209.99 = 15,490,871.56/x - Step 3: Cross multiply
28,543,615.75x = 39,390,209.99 × 15,490,871.56 - Step 4: Simplify right side
28,543,615.75x = 610,188,683,676,518.88 - Step 5: Solve for x
x = 610,188,683,676,518.88/28,543,615.75 - Step 6: Final answer
x = 21,377,413.75
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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.