Finding the Fourth Proportional to 21,651,259.48, 29,878,727.74 and 12,949,431.92
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Solution
The fourth proportional to 21,651,259.48, 29,878,727.74 and 12,949,431.92 is: 17,870,209.86
Step by Step Solution
- Step 1: Write the proportion equation
21,651,259.48 : 29,878,727.74 = 12,949,431.92 : x - Step 2: Convert to fraction form
21,651,259.48/29,878,727.74 = 12,949,431.92/x - Step 3: Cross multiply
21,651,259.48x = 29,878,727.74 × 12,949,431.92 - Step 4: Simplify right side
21,651,259.48x = 386,912,550,725,345.44 - Step 5: Solve for x
x = 386,912,550,725,345.44/21,651,259.48 - Step 6: Final answer
x = 17,870,209.86
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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.