Finding the Fourth Proportional to 21,334,849.76, 29,438,925.42 and 12,957,860.28
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Solution
The fourth proportional to 21,334,849.76, 29,438,925.42 and 12,957,860.28 is: 17,879,923.55
Step by Step Solution
- Step 1: Write the proportion equation
21,334,849.76 : 29,438,925.42 = 12,957,860.28 : x - Step 2: Convert to fraction form
21,334,849.76/29,438,925.42 = 12,957,860.28/x - Step 3: Cross multiply
21,334,849.76x = 29,438,925.42 × 12,957,860.28 - Step 4: Simplify right side
21,334,849.76x = 381,465,482,544,688.25 - Step 5: Solve for x
x = 381,465,482,544,688.25/21,334,849.76 - Step 6: Final answer
x = 17,879,923.55
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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.