Finding the Fourth Proportional to 11,312,643.60, 15,611,799.54 and 6,418,071.88
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Solution
The fourth proportional to 11,312,643.60, 15,611,799.54 and 6,418,071.88 is: 8,857,138.54
Step by Step Solution
- Step 1: Write the proportion equation
11,312,643.60 : 15,611,799.54 = 6,418,071.88 : x - Step 2: Convert to fraction form
11,312,643.60/15,611,799.54 = 6,418,071.88/x - Step 3: Cross multiply
11,312,643.60x = 15,611,799.54 × 6,418,071.88 - Step 4: Simplify right side
11,312,643.60x = 100,197,651,623,870.92 - Step 5: Solve for x
x = 100,197,651,623,870.92/11,312,643.60 - Step 6: Final answer
x = 8,857,138.54
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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.