Finding the Fourth Proportional to 13,686,765.68, 18,891,943.26 and 7,889,423.96
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Solution
The fourth proportional to 13,686,765.68, 18,891,943.26 and 7,889,423.96 is: 10,889,829.88
Step by Step Solution
- Step 1: Write the proportion equation
13,686,765.68 : 18,891,943.26 = 7,889,423.96 : x - Step 2: Convert to fraction form
13,686,765.68/18,891,943.26 = 7,889,423.96/x - Step 3: Cross multiply
13,686,765.68x = 18,891,943.26 × 7,889,423.96 - Step 4: Simplify right side
13,686,765.68x = 149,046,549,806,404.53 - Step 5: Solve for x
x = 149,046,549,806,404.53/13,686,765.68 - Step 6: Final answer
x = 10,889,829.88
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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.