Home / 20,906.46-31,358.16-9,815.67

Finding the Fourth Proportional to 20,906.46, 31,358.16 and 9,815.67

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Solution

The fourth proportional to 20,906.46, 31,358.16 and 9,815.67 is: 14,722.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,906.46 : 31,358.16 = 9,815.67 : x
  2. Step 2: Convert to fraction form
    20,906.46/31,358.16 = 9,815.67/x
  3. Step 3: Cross multiply
    20,906.46x = 31,358.16 × 9,815.67
  4. Step 4: Simplify right side
    20,906.46x = 307,801,350.37
  5. Step 5: Solve for x
    x = 307,801,350.37/20,906.46
  6. Step 6: Final answer
    x = 14,722.79

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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.