Home / 18,936.40-28,399.20-5,785.60

Finding the Fourth Proportional to 18,936.40, 28,399.20 and 5,785.60

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Solution

The fourth proportional to 18,936.40, 28,399.20 and 5,785.60 is: 8,676.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,936.40 : 28,399.20 = 5,785.60 : x
  2. Step 2: Convert to fraction form
    18,936.40/28,399.20 = 5,785.60/x
  3. Step 3: Cross multiply
    18,936.40x = 28,399.20 × 5,785.60
  4. Step 4: Simplify right side
    18,936.40x = 164,306,411.52
  5. Step 5: Solve for x
    x = 164,306,411.52/18,936.40
  6. Step 6: Final answer
    x = 8,676.75

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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.