Home / 8,205.10-12,279.30-4,920.55

Finding the Fourth Proportional to 8,205.10, 12,279.30 and 4,920.55

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Solution

The fourth proportional to 8,205.10, 12,279.30 and 4,920.55 is: 7,363.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,205.10 : 12,279.30 = 4,920.55 : x
  2. Step 2: Convert to fraction form
    8,205.10/12,279.30 = 4,920.55/x
  3. Step 3: Cross multiply
    8,205.10x = 12,279.30 × 4,920.55
  4. Step 4: Simplify right side
    8,205.10x = 60,420,909.62
  5. Step 5: Solve for x
    x = 60,420,909.62/8,205.10
  6. Step 6: Final answer
    x = 7,363.82

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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.