Finding the Fourth Proportional to 19,321, 28,981.50 and 5,470
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Solution
The fourth proportional to 19,321, 28,981.50 and 5,470 is: 8,205
Step by Step Solution
- Step 1: Write the proportion equation
19,321 : 28,981.50 = 5,470 : x - Step 2: Convert to fraction form
19,321/28,981.50 = 5,470/x - Step 3: Cross multiply
19,321x = 28,981.50 × 5,470 - Step 4: Simplify right side
19,321x = 158,528,805 - Step 5: Solve for x
x = 158,528,805/19,321 - Step 6: Final answer
x = 8,205
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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.