Home / 13,660.40-20,485.20-6,638.33

Finding the Fourth Proportional to 13,660.40, 20,485.20 and 6,638.33

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Solution

The fourth proportional to 13,660.40, 20,485.20 and 6,638.33 is: 9,954.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,660.40 : 20,485.20 = 6,638.33 : x
  2. Step 2: Convert to fraction form
    13,660.40/20,485.20 = 6,638.33/x
  3. Step 3: Cross multiply
    13,660.40x = 20,485.20 × 6,638.33
  4. Step 4: Simplify right side
    13,660.40x = 135,987,480.20
  5. Step 5: Solve for x
    x = 135,987,480.20/13,660.40
  6. Step 6: Final answer
    x = 9,954.87

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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.