Finding the Fourth Proportional to 21,104,688.39, 29,101,342.28 and 13,748,880.65
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Solution
The fourth proportional to 21,104,688.39, 29,101,342.28 and 13,748,880.65 is: 18,958,388.50
Step by Step Solution
- Step 1: Write the proportion equation
21,104,688.39 : 29,101,342.28 = 13,748,880.65 : x - Step 2: Convert to fraction form
21,104,688.39/29,101,342.28 = 13,748,880.65/x - Step 3: Cross multiply
21,104,688.39x = 29,101,342.28 × 13,748,880.65 - Step 4: Simplify right side
21,104,688.39x = 400,110,881,789,300.25 - Step 5: Solve for x
x = 400,110,881,789,300.25/21,104,688.39 - Step 6: Final answer
x = 18,958,388.50
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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.