Finding the Fourth Proportional to 21,128,902.80, 29,185,237.35 and 17,472,588.72
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Solution
The fourth proportional to 21,128,902.80, 29,185,237.35 and 17,472,588.72 is: 24,134,790.80
Step by Step Solution
- Step 1: Write the proportion equation
21,128,902.80 : 29,185,237.35 = 17,472,588.72 : x - Step 2: Convert to fraction form
21,128,902.80/29,185,237.35 = 17,472,588.72/x - Step 3: Cross multiply
21,128,902.80x = 29,185,237.35 × 17,472,588.72 - Step 4: Simplify right side
21,128,902.80x = 509,941,648,766,206.50 - Step 5: Solve for x
x = 509,941,648,766,206.50/21,128,902.80 - Step 6: Final answer
x = 24,134,790.80
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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.