Finding the Fourth Proportional to 18,398,921.68, 25,390,169.58 and 10,139,749.12
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Solution
The fourth proportional to 18,398,921.68, 25,390,169.58 and 10,139,749.12 is: 13,992,665.12
Step by Step Solution
- Step 1: Write the proportion equation
18,398,921.68 : 25,390,169.58 = 10,139,749.12 : x - Step 2: Convert to fraction form
18,398,921.68/25,390,169.58 = 10,139,749.12/x - Step 3: Cross multiply
18,398,921.68x = 25,390,169.58 × 10,139,749.12 - Step 4: Simplify right side
18,398,921.68x = 257,449,949,655,455.72 - Step 5: Solve for x
x = 257,449,949,655,455.72/18,398,921.68 - Step 6: Final answer
x = 13,992,665.12
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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.