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Finding the Fourth Proportional to 8,839.36, 12,195.16 and 5,478.72

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Solution

The fourth proportional to 8,839.36, 12,195.16 and 5,478.72 is: 7,558.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,839.36 : 12,195.16 = 5,478.72 : x
  2. Step 2: Convert to fraction form
    8,839.36/12,195.16 = 5,478.72/x
  3. Step 3: Cross multiply
    8,839.36x = 12,195.16 × 5,478.72
  4. Step 4: Simplify right side
    8,839.36x = 66,813,867.00
  5. Step 5: Solve for x
    x = 66,813,867.00/8,839.36
  6. Step 6: Final answer
    x = 7,558.68

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Half scale
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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.