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Finding the Fourth Proportional to 8,676.93, 13,007.41 and 3,128.92

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Solution

The fourth proportional to 8,676.93, 13,007.41 and 3,128.92 is: 4,690.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,676.93 : 13,007.41 = 3,128.92 : x
  2. Step 2: Convert to fraction form
    8,676.93/13,007.41 = 3,128.92/x
  3. Step 3: Cross multiply
    8,676.93x = 13,007.41 × 3,128.92
  4. Step 4: Simplify right side
    8,676.93x = 40,699,145.30
  5. Step 5: Solve for x
    x = 40,699,145.30/8,676.93
  6. Step 6: Final answer
    x = 4,690.50

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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.