Home / 8,288.40-12,432.60-4,789.20

Finding the Fourth Proportional to 8,288.40, 12,432.60 and 4,789.20

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Solution

The fourth proportional to 8,288.40, 12,432.60 and 4,789.20 is: 7,183.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,288.40 : 12,432.60 = 4,789.20 : x
  2. Step 2: Convert to fraction form
    8,288.40/12,432.60 = 4,789.20/x
  3. Step 3: Cross multiply
    8,288.40x = 12,432.60 × 4,789.20
  4. Step 4: Simplify right side
    8,288.40x = 59,542,207.92
  5. Step 5: Solve for x
    x = 59,542,207.92/8,288.40
  6. Step 6: Final answer
    x = 7,183.80

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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.