Finding the Fourth Proportional to 20,417,728.19, 28,176,131.30 and 11,125,408.50
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Solution
The fourth proportional to 20,417,728.19, 28,176,131.30 and 11,125,408.50 is: 15,352,881.95
Step by Step Solution
- Step 1: Write the proportion equation
20,417,728.19 : 28,176,131.30 = 11,125,408.50 : x - Step 2: Convert to fraction form
20,417,728.19/28,176,131.30 = 11,125,408.50/x - Step 3: Cross multiply
20,417,728.19x = 28,176,131.30 × 11,125,408.50 - Step 4: Simplify right side
20,417,728.19x = 313,470,970,521,255.38 - Step 5: Solve for x
x = 313,470,970,521,255.38/20,417,728.19 - Step 6: Final answer
x = 15,352,881.95
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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.