Home / 13,480.50-20,220.80-4,120.48

Finding the Fourth Proportional to 13,480.50, 20,220.80 and 4,120.48

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Solution

The fourth proportional to 13,480.50, 20,220.80 and 4,120.48 is: 6,180.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,480.50 : 20,220.80 = 4,120.48 : x
  2. Step 2: Convert to fraction form
    13,480.50/20,220.80 = 4,120.48/x
  3. Step 3: Cross multiply
    13,480.50x = 20,220.80 × 4,120.48
  4. Step 4: Simplify right side
    13,480.50x = 83,319,361.26
  5. Step 5: Solve for x
    x = 83,319,361.26/13,480.50
  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.