Home / 13,640.40-20,451.69-6,234.57

Finding the Fourth Proportional to 13,640.40, 20,451.69 and 6,234.57

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Solution

The fourth proportional to 13,640.40, 20,451.69 and 6,234.57 is: 9,347.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,640.40 : 20,451.69 = 6,234.57 : x
  2. Step 2: Convert to fraction form
    13,640.40/20,451.69 = 6,234.57/x
  3. Step 3: Cross multiply
    13,640.40x = 20,451.69 × 6,234.57
  4. Step 4: Simplify right side
    13,640.40x = 127,507,492.92
  5. Step 5: Solve for x
    x = 127,507,492.92/13,640.40
  6. Step 6: Final answer
    x = 9,347.78

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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.