Home / 13,480.38-20,220.57-3,620.66

Finding the Fourth Proportional to 13,480.38, 20,220.57 and 3,620.66

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Solution

The fourth proportional to 13,480.38, 20,220.57 and 3,620.66 is: 5,430.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,480.38 : 20,220.57 = 3,620.66 : x
  2. Step 2: Convert to fraction form
    13,480.38/20,220.57 = 3,620.66/x
  3. Step 3: Cross multiply
    13,480.38x = 20,220.57 × 3,620.66
  4. Step 4: Simplify right side
    13,480.38x = 73,211,707.87
  5. Step 5: Solve for x
    x = 73,211,707.87/13,480.38
  6. Step 6: Final answer
    x = 5,430.98

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1.5x scale

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.