Finding the Fourth Proportional to 12,390,813.57, 17,101,782.81 and 7,917,509.19
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Solution
The fourth proportional to 12,390,813.57, 17,101,782.81 and 7,917,509.19 is: 10,927,734.63
Step by Step Solution
- Step 1: Write the proportion equation
12,390,813.57 : 17,101,782.81 = 7,917,509.19 : x - Step 2: Convert to fraction form
12,390,813.57/17,101,782.81 = 7,917,509.19/x - Step 3: Cross multiply
12,390,813.57x = 17,101,782.81 × 7,917,509.19 - Step 4: Simplify right side
12,390,813.57x = 135,403,522,563,559.02 - Step 5: Solve for x
x = 135,403,522,563,559.02/12,390,813.57 - Step 6: Final answer
x = 10,927,734.63
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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.