Home / 20,789.55-31,163.31-8,951.04

Finding the Fourth Proportional to 20,789.55, 31,163.31 and 8,951.04

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Solution

The fourth proportional to 20,789.55, 31,163.31 and 8,951.04 is: 13,417.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.55 : 31,163.31 = 8,951.04 : x
  2. Step 2: Convert to fraction form
    20,789.55/31,163.31 = 8,951.04/x
  3. Step 3: Cross multiply
    20,789.55x = 31,163.31 × 8,951.04
  4. Step 4: Simplify right side
    20,789.55x = 278,943,989.59
  5. Step 5: Solve for x
    x = 278,943,989.59/20,789.55
  6. Step 6: Final answer
    x = 13,417.51

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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.