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Finding the Fourth Proportional to 8,320.80, 11,481.80 and 4,784.40

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Solution

The fourth proportional to 8,320.80, 11,481.80 and 4,784.40 is: 6,601.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,320.80 : 11,481.80 = 4,784.40 : x
  2. Step 2: Convert to fraction form
    8,320.80/11,481.80 = 4,784.40/x
  3. Step 3: Cross multiply
    8,320.80x = 11,481.80 × 4,784.40
  4. Step 4: Simplify right side
    8,320.80x = 54,933,523.92
  5. Step 5: Solve for x
    x = 54,933,523.92/8,320.80
  6. Step 6: Final answer
    x = 6,601.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.