Finding the Fourth Proportional to 7,988,911.40, 11,021,599.78 and 5,087,783.08
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Solution
The fourth proportional to 7,988,911.40, 11,021,599.78 and 5,087,783.08 is: 7,019,167.70
Step by Step Solution
- Step 1: Write the proportion equation
7,988,911.40 : 11,021,599.78 = 5,087,783.08 : x - Step 2: Convert to fraction form
7,988,911.40/11,021,599.78 = 5,087,783.08/x - Step 3: Cross multiply
7,988,911.40x = 11,021,599.78 × 5,087,783.08 - Step 4: Simplify right side
7,988,911.40x = 56,075,508,875,215.72 - Step 5: Solve for x
x = 56,075,508,875,215.72/7,988,911.40 - Step 6: Final answer
x = 7,019,167.70
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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.