Home / 8,279.28-12,420.92-4,121.24

Finding the Fourth Proportional to 8,279.28, 12,420.92 and 4,121.24

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Solution

The fourth proportional to 8,279.28, 12,420.92 and 4,121.24 is: 6,182.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,279.28 : 12,420.92 = 4,121.24 : x
  2. Step 2: Convert to fraction form
    8,279.28/12,420.92 = 4,121.24/x
  3. Step 3: Cross multiply
    8,279.28x = 12,420.92 × 4,121.24
  4. Step 4: Simplify right side
    8,279.28x = 51,189,592.34
  5. Step 5: Solve for x
    x = 51,189,592.34/8,279.28
  6. Step 6: Final answer
    x = 6,182.86

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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.