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Finding the Fourth Proportional to 8,622.64, 12,936.12 and 2,779.12

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Solution

The fourth proportional to 8,622.64, 12,936.12 and 2,779.12 is: 4,169.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,622.64 : 12,936.12 = 2,779.12 : x
  2. Step 2: Convert to fraction form
    8,622.64/12,936.12 = 2,779.12/x
  3. Step 3: Cross multiply
    8,622.64x = 12,936.12 × 2,779.12
  4. Step 4: Simplify right side
    8,622.64x = 35,951,029.81
  5. Step 5: Solve for x
    x = 35,951,029.81/8,622.64
  6. Step 6: Final answer
    x = 4,169.38

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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.