Finding the Fourth Proportional to 21,381,671.28, 29,506,909.20 and 11,592,090.08
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Solution
The fourth proportional to 21,381,671.28, 29,506,909.20 and 11,592,090.08 is: 15,997,194.28
Step by Step Solution
- Step 1: Write the proportion equation
21,381,671.28 : 29,506,909.20 = 11,592,090.08 : x - Step 2: Convert to fraction form
21,381,671.28/29,506,909.20 = 11,592,090.08/x - Step 3: Cross multiply
21,381,671.28x = 29,506,909.20 × 11,592,090.08 - Step 4: Simplify right side
21,381,671.28x = 342,046,749,428,780.75 - Step 5: Solve for x
x = 342,046,749,428,780.75/21,381,671.28 - Step 6: Final answer
x = 15,997,194.28
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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.