Finding the Fourth Proportional to 21,457,517.50, 29,689,349.94 and 18,709,930.42
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Solution
The fourth proportional to 21,457,517.50, 29,689,349.94 and 18,709,930.42 is: 25,887,695.14
Step by Step Solution
- Step 1: Write the proportion equation
21,457,517.50 : 29,689,349.94 = 18,709,930.42 : x - Step 2: Convert to fraction form
21,457,517.50/29,689,349.94 = 18,709,930.42/x - Step 3: Cross multiply
21,457,517.50x = 29,689,349.94 × 18,709,930.42 - Step 4: Simplify right side
21,457,517.50x = 555,485,671,592,431.25 - Step 5: Solve for x
x = 555,485,671,592,431.25/21,457,517.50 - Step 6: Final answer
x = 25,887,695.14
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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.