Finding the Fourth Proportional to 13,438.99, 18,539.35 and 11,572.75
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Solution
The fourth proportional to 13,438.99, 18,539.35 and 11,572.75 is: 15,964.84
Step by Step Solution
- Step 1: Write the proportion equation
13,438.99 : 18,539.35 = 11,572.75 : x - Step 2: Convert to fraction form
13,438.99/18,539.35 = 11,572.75/x - Step 3: Cross multiply
13,438.99x = 18,539.35 × 11,572.75 - Step 4: Simplify right side
13,438.99x = 214,551,262.71 - Step 5: Solve for x
x = 214,551,262.71/13,438.99 - Step 6: Final answer
x = 15,964.84
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1.5x scale
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.