Finding the Fourth Proportional to 15,415,121.51, 21,271,317.36 and 8,538,318.71
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Solution
The fourth proportional to 15,415,121.51, 21,271,317.36 and 8,538,318.71 is: 11,782,021.11
Step by Step Solution
- Step 1: Write the proportion equation
15,415,121.51 : 21,271,317.36 = 8,538,318.71 : x - Step 2: Convert to fraction form
15,415,121.51/21,271,317.36 = 8,538,318.71/x - Step 3: Cross multiply
15,415,121.51x = 21,271,317.36 × 8,538,318.71 - Step 4: Simplify right side
15,415,121.51x = 181,621,287,001,235.81 - Step 5: Solve for x
x = 181,621,287,001,235.81/15,415,121.51 - Step 6: Final answer
x = 11,782,021.11
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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.