Finding the Fourth Proportional to 21,623,768.19, 29,837,854.85 and 12,920,101.11
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Solution
The fourth proportional to 21,623,768.19, 29,837,854.85 and 12,920,101.11 is: 17,827,979.75
Step by Step Solution
- Step 1: Write the proportion equation
21,623,768.19 : 29,837,854.85 = 12,920,101.11 : x - Step 2: Convert to fraction form
21,623,768.19/29,837,854.85 = 12,920,101.11/x - Step 3: Cross multiply
21,623,768.19x = 29,837,854.85 × 12,920,101.11 - Step 4: Simplify right side
21,623,768.19x = 385,508,101,502,903.38 - Step 5: Solve for x
x = 385,508,101,502,903.38/21,623,768.19 - Step 6: Final answer
x = 17,827,979.75
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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.