Home / 8,656.20-12,984.30-3,107.70

Finding the Fourth Proportional to 8,656.20, 12,984.30 and 3,107.70

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Solution

The fourth proportional to 8,656.20, 12,984.30 and 3,107.70 is: 4,661.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,656.20 : 12,984.30 = 3,107.70 : x
  2. Step 2: Convert to fraction form
    8,656.20/12,984.30 = 3,107.70/x
  3. Step 3: Cross multiply
    8,656.20x = 12,984.30 × 3,107.70
  4. Step 4: Simplify right side
    8,656.20x = 40,351,309.11
  5. Step 5: Solve for x
    x = 40,351,309.11/8,656.20
  6. Step 6: Final answer
    x = 4,661.55

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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.