Home / 8,387.20-12,576.66-3,120.63

Finding the Fourth Proportional to 8,387.20, 12,576.66 and 3,120.63

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Solution

The fourth proportional to 8,387.20, 12,576.66 and 3,120.63 is: 4,679.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,387.20 : 12,576.66 = 3,120.63 : x
  2. Step 2: Convert to fraction form
    8,387.20/12,576.66 = 3,120.63/x
  3. Step 3: Cross multiply
    8,387.20x = 12,576.66 × 3,120.63
  4. Step 4: Simplify right side
    8,387.20x = 39,247,102.50
  5. Step 5: Solve for x
    x = 39,247,102.50/8,387.20
  6. Step 6: Final answer
    x = 4,679.40

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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.