Finding the Fourth Proportional to 13,902,386.81, 19,186,430.75 and 7,709,376.15
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Solution
The fourth proportional to 13,902,386.81, 19,186,430.75 and 7,709,376.15 is: 10,639,569.57
Step by Step Solution
- Step 1: Write the proportion equation
13,902,386.81 : 19,186,430.75 = 7,709,376.15 : x - Step 2: Convert to fraction form
13,902,386.81/19,186,430.75 = 7,709,376.15/x - Step 3: Cross multiply
13,902,386.81x = 19,186,430.75 × 7,709,376.15 - Step 4: Simplify right side
13,902,386.81x = 147,915,411,618,039.91 - Step 5: Solve for x
x = 147,915,411,618,039.91/13,902,386.81 - Step 6: Final answer
x = 10,639,569.57
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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.