Finding the Fourth Proportional to 21,420,175.51, 29,559,539.68 and 12,127,505.86
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Solution
The fourth proportional to 21,420,175.51, 29,559,539.68 and 12,127,505.86 is: 16,735,786.81
Step by Step Solution
- Step 1: Write the proportion equation
21,420,175.51 : 29,559,539.68 = 12,127,505.86 : x - Step 2: Convert to fraction form
21,420,175.51/29,559,539.68 = 12,127,505.86/x - Step 3: Cross multiply
21,420,175.51x = 29,559,539.68 × 12,127,505.86 - Step 4: Simplify right side
21,420,175.51x = 358,483,490,688,102.50 - Step 5: Solve for x
x = 358,483,490,688,102.50/21,420,175.51 - Step 6: Final answer
x = 16,735,786.81
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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.