Finding the Fourth Proportional to 20,506,921.79, 28,298,992.11 and 11,339,251.07
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Solution
The fourth proportional to 20,506,921.79, 28,298,992.11 and 11,339,251.07 is: 15,647,856.84
Step by Step Solution
- Step 1: Write the proportion equation
20,506,921.79 : 28,298,992.11 = 11,339,251.07 : x - Step 2: Convert to fraction form
20,506,921.79/28,298,992.11 = 11,339,251.07/x - Step 3: Cross multiply
20,506,921.79x = 28,298,992.11 × 11,339,251.07 - Step 4: Simplify right side
20,506,921.79x = 320,889,376,421,744.06 - Step 5: Solve for x
x = 320,889,376,421,744.06/20,506,921.79 - Step 6: Final answer
x = 15,647,856.84
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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.