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Finding the Fourth Proportional to 8,676.72, 13,005.36 and 4,289.76

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Solution

The fourth proportional to 8,676.72, 13,005.36 and 4,289.76 is: 6,429.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,676.72 : 13,005.36 = 4,289.76 : x
  2. Step 2: Convert to fraction form
    8,676.72/13,005.36 = 4,289.76/x
  3. Step 3: Cross multiply
    8,676.72x = 13,005.36 × 4,289.76
  4. Step 4: Simplify right side
    8,676.72x = 55,789,873.11
  5. Step 5: Solve for x
    x = 55,789,873.11/8,676.72
  6. Step 6: Final answer
    x = 6,429.83

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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.