Home / 8,123.60-12,209.28-6,745.76

Finding the Fourth Proportional to 8,123.60, 12,209.28 and 6,745.76

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Solution

The fourth proportional to 8,123.60, 12,209.28 and 6,745.76 is: 10,138.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,123.60 : 12,209.28 = 6,745.76 : x
  2. Step 2: Convert to fraction form
    8,123.60/12,209.28 = 6,745.76/x
  3. Step 3: Cross multiply
    8,123.60x = 12,209.28 × 6,745.76
  4. Step 4: Simplify right side
    8,123.60x = 82,360,872.65
  5. Step 5: Solve for x
    x = 82,360,872.65/8,123.60
  6. Step 6: Final answer
    x = 10,138.47

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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.