Finding the Fourth Proportional to 15,219,320.13, 21,003,983.64 and 8,345,130.80
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Solution
The fourth proportional to 15,219,320.13, 21,003,983.64 and 8,345,130.80 is: 11,517,005.31
Step by Step Solution
- Step 1: Write the proportion equation
15,219,320.13 : 21,003,983.64 = 8,345,130.80 : x - Step 2: Convert to fraction form
15,219,320.13/21,003,983.64 = 8,345,130.80/x - Step 3: Cross multiply
15,219,320.13x = 21,003,983.64 × 8,345,130.80 - Step 4: Simplify right side
15,219,320.13x = 175,280,990,691,840.19 - Step 5: Solve for x
x = 175,280,990,691,840.19/15,219,320.13 - Step 6: Final answer
x = 11,517,005.31
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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.