Home / 8,618.28-12,928.68-2,772.96

Finding the Fourth Proportional to 8,618.28, 12,928.68 and 2,772.96

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Solution

The fourth proportional to 8,618.28, 12,928.68 and 2,772.96 is: 4,159.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,618.28 : 12,928.68 = 2,772.96 : x
  2. Step 2: Convert to fraction form
    8,618.28/12,928.68 = 2,772.96/x
  3. Step 3: Cross multiply
    8,618.28x = 12,928.68 × 2,772.96
  4. Step 4: Simplify right side
    8,618.28x = 35,850,712.49
  5. Step 5: Solve for x
    x = 35,850,712.49/8,618.28
  6. Step 6: Final answer
    x = 4,159.85

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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.