Finding the Fourth Proportional to 13,291,389.13, 18,342,133.37 and 7,179,817.63
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Solution
The fourth proportional to 13,291,389.13, 18,342,133.37 and 7,179,817.63 is: 9,908,157.17
Step by Step Solution
- Step 1: Write the proportion equation
13,291,389.13 : 18,342,133.37 = 7,179,817.63 : x - Step 2: Convert to fraction form
13,291,389.13/18,342,133.37 = 7,179,817.63/x - Step 3: Cross multiply
13,291,389.13x = 18,342,133.37 × 7,179,817.63 - Step 4: Simplify right side
13,291,389.13x = 131,693,172,541,737.31 - Step 5: Solve for x
x = 131,693,172,541,737.31/13,291,389.13 - Step 6: Final answer
x = 9,908,157.17
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1.5x scale
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.