Finding the Fourth Proportional to 7,221,720.36, 9,960,163.07 and 6,348,688.40
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Solution
The fourth proportional to 7,221,720.36, 9,960,163.07 and 6,348,688.40 is: 8,756,081.45
Step by Step Solution
- Step 1: Write the proportion equation
7,221,720.36 : 9,960,163.07 = 6,348,688.40 : x - Step 2: Convert to fraction form
7,221,720.36/9,960,163.07 = 6,348,688.40/x - Step 3: Cross multiply
7,221,720.36x = 9,960,163.07 × 6,348,688.40 - Step 4: Simplify right side
7,221,720.36x = 63,233,971,663,073.12 - Step 5: Solve for x
x = 63,233,971,663,073.12/7,221,720.36 - Step 6: Final answer
x = 8,756,081.45
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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.