Home / 20,738.36-31,120.50-15,105.64

Finding the Fourth Proportional to 20,738.36, 31,120.50 and 15,105.64

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Solution

The fourth proportional to 20,738.36, 31,120.50 and 15,105.64 is: 22,667.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.36 : 31,120.50 = 15,105.64 : x
  2. Step 2: Convert to fraction form
    20,738.36/31,120.50 = 15,105.64/x
  3. Step 3: Cross multiply
    20,738.36x = 31,120.50 × 15,105.64
  4. Step 4: Simplify right side
    20,738.36x = 470,095,069.62
  5. Step 5: Solve for x
    x = 470,095,069.62/20,738.36
  6. Step 6: Final answer
    x = 22,667.90

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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.