Finding the Fourth Proportional to 20,878,769.55, 28,812,639.69 and 11,587,739.07
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Solution
The fourth proportional to 20,878,769.55, 28,812,639.69 and 11,587,739.07 is: 15,991,045.35
Step by Step Solution
- Step 1: Write the proportion equation
20,878,769.55 : 28,812,639.69 = 11,587,739.07 : x - Step 2: Convert to fraction form
20,878,769.55/28,812,639.69 = 11,587,739.07/x - Step 3: Cross multiply
20,878,769.55x = 28,812,639.69 × 11,587,739.07 - Step 4: Simplify right side
20,878,769.55x = 333,873,350,645,645.69 - Step 5: Solve for x
x = 333,873,350,645,645.69/20,878,769.55 - Step 6: Final answer
x = 15,991,045.35
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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.