Finding the Fourth Proportional to 10,987,615.20, 16,488,421.20 and 6,438,655.20
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Solution
The fourth proportional to 10,987,615.20, 16,488,421.20 and 6,438,655.20 is: 9,662,083.81
Step by Step Solution
- Step 1: Write the proportion equation
10,987,615.20 : 16,488,421.20 = 6,438,655.20 : x - Step 2: Convert to fraction form
10,987,615.20/16,488,421.20 = 6,438,655.20/x - Step 3: Cross multiply
10,987,615.20x = 16,488,421.20 × 6,438,655.20 - Step 4: Simplify right side
10,987,615.20x = 106,163,258,899,170.23 - Step 5: Solve for x
x = 106,163,258,899,170.23/10,987,615.20 - Step 6: Final answer
x = 9,662,083.81
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.