Home / 20,455.21-30,679.33-5,660.66

Finding the Fourth Proportional to 20,455.21, 30,679.33 and 5,660.66

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Solution

The fourth proportional to 20,455.21, 30,679.33 and 5,660.66 is: 8,490.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,455.21 : 30,679.33 = 5,660.66 : x
  2. Step 2: Convert to fraction form
    20,455.21/30,679.33 = 5,660.66/x
  3. Step 3: Cross multiply
    20,455.21x = 30,679.33 × 5,660.66
  4. Step 4: Simplify right side
    20,455.21x = 173,665,258.95
  5. Step 5: Solve for x
    x = 173,665,258.95/20,455.21
  6. Step 6: Final answer
    x = 8,490.03

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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.