Finding the Fourth Proportional to 13,920,780.26, 19,212,985.68 and 8,119,561.88
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Solution
The fourth proportional to 13,920,780.26, 19,212,985.68 and 8,119,561.88 is: 11,206,342.12
Step by Step Solution
- Step 1: Write the proportion equation
13,920,780.26 : 19,212,985.68 = 8,119,561.88 : x - Step 2: Convert to fraction form
13,920,780.26/19,212,985.68 = 8,119,561.88/x - Step 3: Cross multiply
13,920,780.26x = 19,212,985.68 × 8,119,561.88 - Step 4: Simplify right side
13,920,780.26x = 156,001,026,128,313.88 - Step 5: Solve for x
x = 156,001,026,128,313.88/13,920,780.26 - Step 6: Final answer
x = 11,206,342.12
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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.