Home / 13,939.05-20,908.58-5,172.23

Finding the Fourth Proportional to 13,939.05, 20,908.58 and 5,172.23

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Solution

The fourth proportional to 13,939.05, 20,908.58 and 5,172.23 is: 7,758.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,939.05 : 20,908.58 = 5,172.23 : x
  2. Step 2: Convert to fraction form
    13,939.05/20,908.58 = 5,172.23/x
  3. Step 3: Cross multiply
    13,939.05x = 20,908.58 × 5,172.23
  4. Step 4: Simplify right side
    13,939.05x = 108,143,854.33
  5. Step 5: Solve for x
    x = 108,143,854.33/13,939.05
  6. Step 6: Final answer
    x = 7,758.34

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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.