Home / 8,210.10-12,319.20-3,279.90

Finding the Fourth Proportional to 8,210.10, 12,319.20 and 3,279.90

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Solution

The fourth proportional to 8,210.10, 12,319.20 and 3,279.90 is: 4,921.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,210.10 : 12,319.20 = 3,279.90 : x
  2. Step 2: Convert to fraction form
    8,210.10/12,319.20 = 3,279.90/x
  3. Step 3: Cross multiply
    8,210.10x = 12,319.20 × 3,279.90
  4. Step 4: Simplify right side
    8,210.10x = 40,405,744.08
  5. Step 5: Solve for x
    x = 40,405,744.08/8,210.10
  6. Step 6: Final answer
    x = 4,921.47

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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.