Finding the Fourth Proportional to 13,132,735.91, 18,128,011.79 and 7,905,987.14
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Solution
The fourth proportional to 13,132,735.91, 18,128,011.79 and 7,905,987.14 is: 10,913,173.69
Step by Step Solution
- Step 1: Write the proportion equation
13,132,735.91 : 18,128,011.79 = 7,905,987.14 : x - Step 2: Convert to fraction form
13,132,735.91/18,128,011.79 = 7,905,987.14/x - Step 3: Cross multiply
13,132,735.91x = 18,128,011.79 × 7,905,987.14 - Step 4: Simplify right side
13,132,735.91x = 143,319,827,955,338.38 - Step 5: Solve for x
x = 143,319,827,955,338.38/13,132,735.91 - Step 6: Final answer
x = 10,913,173.69
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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.