Home / 13,403.20-20,106.60-4,640.80

Finding the Fourth Proportional to 13,403.20, 20,106.60 and 4,640.80

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Solution

The fourth proportional to 13,403.20, 20,106.60 and 4,640.80 is: 6,961.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,403.20 : 20,106.60 = 4,640.80 : x
  2. Step 2: Convert to fraction form
    13,403.20/20,106.60 = 4,640.80/x
  3. Step 3: Cross multiply
    13,403.20x = 20,106.60 × 4,640.80
  4. Step 4: Simplify right side
    13,403.20x = 93,310,709.28
  5. Step 5: Solve for x
    x = 93,310,709.28/13,403.20
  6. Step 6: Final answer
    x = 6,961.82

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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.