Finding the Fourth Proportional to 28,918,928.40, 39,908,528.36 and 15,865,950.12
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Solution
The fourth proportional to 28,918,928.40, 39,908,528.36 and 15,865,950.12 is: 21,895,234.55
Step by Step Solution
- Step 1: Write the proportion equation
28,918,928.40 : 39,908,528.36 = 15,865,950.12 : x - Step 2: Convert to fraction form
28,918,928.40/39,908,528.36 = 15,865,950.12/x - Step 3: Cross multiply
28,918,928.40x = 39,908,528.36 × 15,865,950.12 - Step 4: Simplify right side
28,918,928.40x = 633,186,720,322,365.38 - Step 5: Solve for x
x = 633,186,720,322,365.38/28,918,928.40 - Step 6: Final answer
x = 21,895,234.55
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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.