Finding the Fourth Proportional to 20,466,666.23, 28,256,745.91 and 13,028,525.09
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Solution
The fourth proportional to 20,466,666.23, 28,256,745.91 and 13,028,525.09 is: 17,987,478.71
Step by Step Solution
- Step 1: Write the proportion equation
20,466,666.23 : 28,256,745.91 = 13,028,525.09 : x - Step 2: Convert to fraction form
20,466,666.23/28,256,745.91 = 13,028,525.09/x - Step 3: Cross multiply
20,466,666.23x = 28,256,745.91 × 13,028,525.09 - Step 4: Simplify right side
20,466,666.23x = 368,143,723,088,260.38 - Step 5: Solve for x
x = 368,143,723,088,260.38/20,466,666.23 - Step 6: Final answer
x = 17,987,478.71
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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.