Finding the Fourth Proportional to 21,122,536.95, 29,153,649.51 and 12,865,321.62
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Solution
The fourth proportional to 21,122,536.95, 29,153,649.51 and 12,865,321.62 is: 17,756,914.25
Step by Step Solution
- Step 1: Write the proportion equation
21,122,536.95 : 29,153,649.51 = 12,865,321.62 : x - Step 2: Convert to fraction form
21,122,536.95/29,153,649.51 = 12,865,321.62/x - Step 3: Cross multiply
21,122,536.95x = 29,153,649.51 × 12,865,321.62 - Step 4: Simplify right side
21,122,536.95x = 375,071,077,342,905.38 - Step 5: Solve for x
x = 375,071,077,342,905.38/21,122,536.95 - Step 6: Final answer
x = 17,756,914.25
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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.