Finding the Fourth Proportional to 21,121,900.86, 29,201,529.79 and 15,606,576.84
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Solution
The fourth proportional to 21,121,900.86, 29,201,529.79 and 15,606,576.84 is: 21,576,463.29
Step by Step Solution
- Step 1: Write the proportion equation
21,121,900.86 : 29,201,529.79 = 15,606,576.84 : x - Step 2: Convert to fraction form
21,121,900.86/29,201,529.79 = 15,606,576.84/x - Step 3: Cross multiply
21,121,900.86x = 29,201,529.79 × 15,606,576.84 - Step 4: Simplify right side
21,121,900.86x = 455,735,918,513,184.06 - Step 5: Solve for x
x = 455,735,918,513,184.06/21,121,900.86 - Step 6: Final answer
x = 21,576,463.29
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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.