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Finding the Fourth Proportional to 8,704.89, 12,004.88 and 5,719.68

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Solution

The fourth proportional to 8,704.89, 12,004.88 and 5,719.68 is: 7,887.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,704.89 : 12,004.88 = 5,719.68 : x
  2. Step 2: Convert to fraction form
    8,704.89/12,004.88 = 5,719.68/x
  3. Step 3: Cross multiply
    8,704.89x = 12,004.88 × 5,719.68
  4. Step 4: Simplify right side
    8,704.89x = 68,664,043.44
  5. Step 5: Solve for x
    x = 68,664,043.44/8,704.89
  6. Step 6: Final answer
    x = 7,887.99

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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.