Home / 8,115.20-12,165.60-4,824.80

Finding the Fourth Proportional to 8,115.20, 12,165.60 and 4,824.80

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Solution

The fourth proportional to 8,115.20, 12,165.60 and 4,824.80 is: 7,232.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,115.20 : 12,165.60 = 4,824.80 : x
  2. Step 2: Convert to fraction form
    8,115.20/12,165.60 = 4,824.80/x
  3. Step 3: Cross multiply
    8,115.20x = 12,165.60 × 4,824.80
  4. Step 4: Simplify right side
    8,115.20x = 58,696,586.88
  5. Step 5: Solve for x
    x = 58,696,586.88/8,115.20
  6. Step 6: Final answer
    x = 7,232.92

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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.