Home / 11,865.20-17,789.70-5,628.20

Finding the Fourth Proportional to 11,865.20, 17,789.70 and 5,628.20

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Solution

The fourth proportional to 11,865.20, 17,789.70 and 5,628.20 is: 8,438.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,865.20 : 17,789.70 = 5,628.20 : x
  2. Step 2: Convert to fraction form
    11,865.20/17,789.70 = 5,628.20/x
  3. Step 3: Cross multiply
    11,865.20x = 17,789.70 × 5,628.20
  4. Step 4: Simplify right side
    11,865.20x = 100,123,989.54
  5. Step 5: Solve for x
    x = 100,123,989.54/11,865.20
  6. Step 6: Final answer
    x = 8,438.46

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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.