Finding the Fourth Proportional to 21,720,739.96, 29,972,873.10 and 12,553,976.44
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Solution
The fourth proportional to 21,720,739.96, 29,972,873.10 and 12,553,976.44 is: 17,323,477.17
Step by Step Solution
- Step 1: Write the proportion equation
21,720,739.96 : 29,972,873.10 = 12,553,976.44 : x - Step 2: Convert to fraction form
21,720,739.96/29,972,873.10 = 12,553,976.44/x - Step 3: Cross multiply
21,720,739.96x = 29,972,873.10 × 12,553,976.44 - Step 4: Simplify right side
21,720,739.96x = 376,278,742,736,509.75 - Step 5: Solve for x
x = 376,278,742,736,509.75/21,720,739.96 - Step 6: Final answer
x = 17,323,477.17
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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.