Finding the Fourth Proportional to 11,128,289.68, 15,390,849.04 and 9,981,951.76
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Solution
The fourth proportional to 11,128,289.68, 15,390,849.04 and 9,981,951.76 is: 13,805,419.98
Step by Step Solution
- Step 1: Write the proportion equation
11,128,289.68 : 15,390,849.04 = 9,981,951.76 : x - Step 2: Convert to fraction form
11,128,289.68/15,390,849.04 = 9,981,951.76/x - Step 3: Cross multiply
11,128,289.68x = 15,390,849.04 × 9,981,951.76 - Step 4: Simplify right side
11,128,289.68x = 153,630,712,662,722.31 - Step 5: Solve for x
x = 153,630,712,662,722.31/11,128,289.68 - Step 6: Final answer
x = 13,805,419.98
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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.