Finding the Fourth Proportional to 19,920,221.20, 29,856,712.20 and 17,888,935.60
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Solution
The fourth proportional to 19,920,221.20, 29,856,712.20 and 17,888,935.60 is: 26,812,192.32
Step by Step Solution
- Step 1: Write the proportion equation
19,920,221.20 : 29,856,712.20 = 17,888,935.60 : x - Step 2: Convert to fraction form
19,920,221.20/29,856,712.20 = 17,888,935.60/x - Step 3: Cross multiply
19,920,221.20x = 29,856,712.20 × 17,888,935.60 - Step 4: Simplify right side
19,920,221.20x = 534,104,801,773,534.38 - Step 5: Solve for x
x = 534,104,801,773,534.38/19,920,221.20 - Step 6: Final answer
x = 26,812,192.32
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1.5x scale
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.