Home / 13,480.70-20,221.11-4,120.47

Finding the Fourth Proportional to 13,480.70, 20,221.11 and 4,120.47

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Solution

The fourth proportional to 13,480.70, 20,221.11 and 4,120.47 is: 6,180.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,480.70 : 20,221.11 = 4,120.47 : x
  2. Step 2: Convert to fraction form
    13,480.70/20,221.11 = 4,120.47/x
  3. Step 3: Cross multiply
    13,480.70x = 20,221.11 × 4,120.47
  4. Step 4: Simplify right side
    13,480.70x = 83,320,477.12
  5. Step 5: Solve for x
    x = 83,320,477.12/13,480.70
  6. Step 6: Final answer
    x = 6,180.73

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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.