Finding the Fourth Proportional to 13,686,511.68, 18,887,981.76 and 7,574,938.56
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Solution
The fourth proportional to 13,686,511.68, 18,887,981.76 and 7,574,938.56 is: 10,453,744.88
Step by Step Solution
- Step 1: Write the proportion equation
13,686,511.68 : 18,887,981.76 = 7,574,938.56 : x - Step 2: Convert to fraction form
13,686,511.68/18,887,981.76 = 7,574,938.56/x - Step 3: Cross multiply
13,686,511.68x = 18,887,981.76 × 7,574,938.56 - Step 4: Simplify right side
13,686,511.68x = 143,075,301,354,400.66 - Step 5: Solve for x
x = 143,075,301,354,400.66/13,686,511.68 - Step 6: Final answer
x = 10,453,744.88
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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.