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Finding the Fourth Proportional to 36,720, 55,088.64 and 12,096

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Solution

The fourth proportional to 36,720, 55,088.64 and 12,096 is: 18,146.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,720 : 55,088.64 = 12,096 : x
  2. Step 2: Convert to fraction form
    36,720/55,088.64 = 12,096/x
  3. Step 3: Cross multiply
    36,720x = 55,088.64 × 12,096
  4. Step 4: Simplify right side
    36,720x = 666,352,189.44
  5. Step 5: Solve for x
    x = 666,352,189.44/36,720
  6. Step 6: Final answer
    x = 18,146.85

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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.