Finding the Fourth Proportional to 18,931,413.80, 28,355,130.30 and 16,411,989.80
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Solution
The fourth proportional to 18,931,413.80, 28,355,130.30 and 16,411,989.80 is: 24,581,582.45
Step by Step Solution
- Step 1: Write the proportion equation
18,931,413.80 : 28,355,130.30 = 16,411,989.80 : x - Step 2: Convert to fraction form
18,931,413.80/28,355,130.30 = 16,411,989.80/x - Step 3: Cross multiply
18,931,413.80x = 28,355,130.30 × 16,411,989.80 - Step 4: Simplify right side
18,931,413.80x = 465,364,109,261,271 - Step 5: Solve for x
x = 465,364,109,261,271/18,931,413.80 - Step 6: Final answer
x = 24,581,582.45
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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.