Finding the Fourth Proportional to 15,113,512.68, 20,856,854.74 and 8,237,979.96
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Solution
The fourth proportional to 15,113,512.68, 20,856,854.74 and 8,237,979.96 is: 11,368,525.31
Step by Step Solution
- Step 1: Write the proportion equation
15,113,512.68 : 20,856,854.74 = 8,237,979.96 : x - Step 2: Convert to fraction form
15,113,512.68/20,856,854.74 = 8,237,979.96/x - Step 3: Cross multiply
15,113,512.68x = 20,856,854.74 × 8,237,979.96 - Step 4: Simplify right side
15,113,512.68x = 171,818,351,376,751 - Step 5: Solve for x
x = 171,818,351,376,751/15,113,512.68 - Step 6: Final answer
x = 11,368,525.31
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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.