Finding the Fourth Proportional to 21,308,139.09, 29,385,621.74 and 13,963,304.63
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Solution
The fourth proportional to 21,308,139.09, 29,385,621.74 and 13,963,304.63 is: 19,256,509.74
Step by Step Solution
- Step 1: Write the proportion equation
21,308,139.09 : 29,385,621.74 = 13,963,304.63 : x - Step 2: Convert to fraction form
21,308,139.09/29,385,621.74 = 13,963,304.63/x - Step 3: Cross multiply
21,308,139.09x = 29,385,621.74 × 13,963,304.63 - Step 4: Simplify right side
21,308,139.09x = 410,320,387,880,826 - Step 5: Solve for x
x = 410,320,387,880,826/21,308,139.09 - Step 6: Final answer
x = 19,256,509.74
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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.