Finding the Fourth Proportional to 18,398,920.68, 25,390,168.20 and 10,139,748.12
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Solution
The fourth proportional to 18,398,920.68, 25,390,168.20 and 10,139,748.12 is: 13,992,663.74
Step by Step Solution
- Step 1: Write the proportion equation
18,398,920.68 : 25,390,168.20 = 10,139,748.12 : x - Step 2: Convert to fraction form
18,398,920.68/25,390,168.20 = 10,139,748.12/x - Step 3: Cross multiply
18,398,920.68x = 25,390,168.20 × 10,139,748.12 - Step 4: Simplify right side
18,398,920.68x = 257,449,910,272,433.75 - Step 5: Solve for x
x = 257,449,910,272,433.75/18,398,920.68 - Step 6: Final answer
x = 13,992,663.74
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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.