Finding the Fourth Proportional to 28,155,976.63, 38,855,247.74 and 15,278,920.63
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Solution
The fourth proportional to 28,155,976.63, 38,855,247.74 and 15,278,920.63 is: 21,084,910.46
Step by Step Solution
- Step 1: Write the proportion equation
28,155,976.63 : 38,855,247.74 = 15,278,920.63 : x - Step 2: Convert to fraction form
28,155,976.63/38,855,247.74 = 15,278,920.63/x - Step 3: Cross multiply
28,155,976.63x = 38,855,247.74 × 15,278,920.63 - Step 4: Simplify right side
28,155,976.63x = 593,666,246,278,447 - Step 5: Solve for x
x = 593,666,246,278,447/28,155,976.63 - Step 6: Final answer
x = 21,084,910.46
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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.