Home / 13,906.36-20,849.74-5,140.12

Finding the Fourth Proportional to 13,906.36, 20,849.74 and 5,140.12

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Solution

The fourth proportional to 13,906.36, 20,849.74 and 5,140.12 is: 7,706.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,906.36 : 20,849.74 = 5,140.12 : x
  2. Step 2: Convert to fraction form
    13,906.36/20,849.74 = 5,140.12/x
  3. Step 3: Cross multiply
    13,906.36x = 20,849.74 × 5,140.12
  4. Step 4: Simplify right side
    13,906.36x = 107,170,165.57
  5. Step 5: Solve for x
    x = 107,170,165.57/13,906.36
  6. Step 6: Final answer
    x = 7,706.56

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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.