Finding the Fourth Proportional to 20,736,000.90, 31,104,001.35 and 13,121,741.70
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Solution
The fourth proportional to 20,736,000.90, 31,104,001.35 and 13,121,741.70 is: 19,682,612.55
Step by Step Solution
- Step 1: Write the proportion equation
20,736,000.90 : 31,104,001.35 = 13,121,741.70 : x - Step 2: Convert to fraction form
20,736,000.90/31,104,001.35 = 13,121,741.70/x - Step 3: Cross multiply
20,736,000.90x = 31,104,001.35 × 13,121,741.70 - Step 4: Simplify right side
20,736,000.90x = 408,138,671,551,151.31 - Step 5: Solve for x
x = 408,138,671,551,151.31/20,736,000.90 - Step 6: Final answer
x = 19,682,612.55
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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.