Home / 13,999.36-20,999.04-4,138.88

Finding the Fourth Proportional to 13,999.36, 20,999.04 and 4,138.88

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Solution

The fourth proportional to 13,999.36, 20,999.04 and 4,138.88 is: 6,208.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,999.36 : 20,999.04 = 4,138.88 : x
  2. Step 2: Convert to fraction form
    13,999.36/20,999.04 = 4,138.88/x
  3. Step 3: Cross multiply
    13,999.36x = 20,999.04 × 4,138.88
  4. Step 4: Simplify right side
    13,999.36x = 86,912,506.68
  5. Step 5: Solve for x
    x = 86,912,506.68/13,999.36
  6. Step 6: Final answer
    x = 6,208.32

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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.