Finding the Fourth Proportional to 28,718,659.92, 39,631,702.62 and 15,665,918.84
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Solution
The fourth proportional to 28,718,659.92, 39,631,702.62 and 15,665,918.84 is: 21,618,941.77
Step by Step Solution
- Step 1: Write the proportion equation
28,718,659.92 : 39,631,702.62 = 15,665,918.84 : x - Step 2: Convert to fraction form
28,718,659.92/39,631,702.62 = 15,665,918.84/x - Step 3: Cross multiply
28,718,659.92x = 39,631,702.62 × 15,665,918.84 - Step 4: Simplify right side
28,718,659.92x = 620,867,036,537,776.88 - Step 5: Solve for x
x = 620,867,036,537,776.88/28,718,659.92 - Step 6: Final answer
x = 21,618,941.77
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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.