Finding the Fourth Proportional to 20,878,291.36, 28,811,982.36 and 11,587,263.76
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Solution
The fourth proportional to 20,878,291.36, 28,811,982.36 and 11,587,263.76 is: 15,990,390.85
Step by Step Solution
- Step 1: Write the proportion equation
20,878,291.36 : 28,811,982.36 = 11,587,263.76 : x - Step 2: Convert to fraction form
20,878,291.36/28,811,982.36 = 11,587,263.76/x - Step 3: Cross multiply
20,878,291.36x = 28,811,982.36 × 11,587,263.76 - Step 4: Simplify right side
20,878,291.36x = 333,852,039,053,787.25 - Step 5: Solve for x
x = 333,852,039,053,787.25/20,878,291.36 - Step 6: Final answer
x = 15,990,390.85
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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.