Finding the Fourth Proportional to 21,427,628.76, 29,566,672.65 and 13,165,033.68
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Solution
The fourth proportional to 21,427,628.76, 29,566,672.65 and 13,165,033.68 is: 18,165,623.72
Step by Step Solution
- Step 1: Write the proportion equation
21,427,628.76 : 29,566,672.65 = 13,165,033.68 : x - Step 2: Convert to fraction form
21,427,628.76/29,566,672.65 = 13,165,033.68/x - Step 3: Cross multiply
21,427,628.76x = 29,566,672.65 × 13,165,033.68 - Step 4: Simplify right side
21,427,628.76x = 389,246,241,242,784.81 - Step 5: Solve for x
x = 389,246,241,242,784.81/21,427,628.76 - Step 6: Final answer
x = 18,165,623.72
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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.