Home / 13,640.94-20,460.80-5,634.70

Finding the Fourth Proportional to 13,640.94, 20,460.80 and 5,634.70

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Solution

The fourth proportional to 13,640.94, 20,460.80 and 5,634.70 is: 8,451.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,640.94 : 20,460.80 = 5,634.70 : x
  2. Step 2: Convert to fraction form
    13,640.94/20,460.80 = 5,634.70/x
  3. Step 3: Cross multiply
    13,640.94x = 20,460.80 × 5,634.70
  4. Step 4: Simplify right side
    13,640.94x = 115,290,432.69
  5. Step 5: Solve for x
    x = 115,290,432.69/13,640.94
  6. Step 6: Final answer
    x = 8,451.80

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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.