Home / 20,709.21-31,063.81-5,126.83

Finding the Fourth Proportional to 20,709.21, 31,063.81 and 5,126.83

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Solution

The fourth proportional to 20,709.21, 31,063.81 and 5,126.83 is: 7,690.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,709.21 : 31,063.81 = 5,126.83 : x
  2. Step 2: Convert to fraction form
    20,709.21/31,063.81 = 5,126.83/x
  3. Step 3: Cross multiply
    20,709.21x = 31,063.81 × 5,126.83
  4. Step 4: Simplify right side
    20,709.21x = 159,258,847.39
  5. Step 5: Solve for x
    x = 159,258,847.39/20,709.21
  6. Step 6: Final answer
    x = 7,690.24

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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.