Finding the Fourth Proportional to 28,057,138,655, 38,718,542,889.42 and 15,196,458,686.84
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Solution
The fourth proportional to 28,057,138,655, 38,718,542,889.42 and 15,196,458,686.84 is: 20,970,945,921.06
Step by Step Solution
- Step 1: Write the proportion equation
28,057,138,655 : 38,718,542,889.42 = 15,196,458,686.84 : x - Step 2: Convert to fraction form
28,057,138,655/38,718,542,889.42 = 15,196,458,686.84/x - Step 3: Cross multiply
28,057,138,655x = 38,718,542,889.42 × 15,196,458,686.84 - Step 4: Simplify right side
28,057,138,655x = 588,384,737,433,713,639,424 - Step 5: Solve for x
x = 588,384,737,433,713,639,424/28,057,138,655 - Step 6: Final answer
x = 20,970,945,921.06
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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.