Finding the Fourth Proportional to 38,688,639.12, 53,390,319.55 and 21,284,610.98
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Solution
The fourth proportional to 38,688,639.12, 53,390,319.55 and 21,284,610.98 is: 29,372,761.80
Step by Step Solution
- Step 1: Write the proportion equation
38,688,639.12 : 53,390,319.55 = 21,284,610.98 : x - Step 2: Convert to fraction form
38,688,639.12/53,390,319.55 = 21,284,610.98/x - Step 3: Cross multiply
38,688,639.12x = 53,390,319.55 × 21,284,610.98 - Step 4: Simplify right side
38,688,639.12x = 1,136,392,181,399,475.50 - Step 5: Solve for x
x = 1,136,392,181,399,475.50/38,688,639.12 - Step 6: Final answer
x = 29,372,761.80
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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.