Home / 20,785.32-31,190.64-10,931.64

Finding the Fourth Proportional to 20,785.32, 31,190.64 and 10,931.64

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Solution

The fourth proportional to 20,785.32, 31,190.64 and 10,931.64 is: 16,404.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785.32 : 31,190.64 = 10,931.64 : x
  2. Step 2: Convert to fraction form
    20,785.32/31,190.64 = 10,931.64/x
  3. Step 3: Cross multiply
    20,785.32x = 31,190.64 × 10,931.64
  4. Step 4: Simplify right side
    20,785.32x = 340,964,847.85
  5. Step 5: Solve for x
    x = 340,964,847.85/20,785.32
  6. Step 6: Final answer
    x = 16,404.12

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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.