Finding the Fourth Proportional to 20,939,280.99, 28,895,792.56 and 11,646,651.68
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Solution
The fourth proportional to 20,939,280.99, 28,895,792.56 and 11,646,651.68 is: 16,072,148.38
Step by Step Solution
- Step 1: Write the proportion equation
20,939,280.99 : 28,895,792.56 = 11,646,651.68 : x - Step 2: Convert to fraction form
20,939,280.99/28,895,792.56 = 11,646,651.68/x - Step 3: Cross multiply
20,939,280.99x = 28,895,792.56 × 11,646,651.68 - Step 4: Simplify right side
20,939,280.99x = 336,539,230,963,855.50 - Step 5: Solve for x
x = 336,539,230,963,855.50/20,939,280.99 - Step 6: Final answer
x = 16,072,148.38
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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.