Finding the Fourth Proportional to 28,528,145.87, 42,790,637.68 and 20,859,649.07
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Solution
The fourth proportional to 28,528,145.87, 42,790,637.68 and 20,859,649.07 is: 31,288,317.49
Step by Step Solution
- Step 1: Write the proportion equation
28,528,145.87 : 42,790,637.68 = 20,859,649.07 : x - Step 2: Convert to fraction form
28,528,145.87/42,790,637.68 = 20,859,649.07/x - Step 3: Cross multiply
28,528,145.87x = 42,790,637.68 × 20,859,649.07 - Step 4: Simplify right side
28,528,145.87x = 892,597,685,220,216.75 - Step 5: Solve for x
x = 892,597,685,220,216.75/28,528,145.87 - Step 6: Final answer
x = 31,288,317.49
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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.