Home / 8,200.20-12,305.70-4,690.20

Finding the Fourth Proportional to 8,200.20, 12,305.70 and 4,690.20

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Solution

The fourth proportional to 8,200.20, 12,305.70 and 4,690.20 is: 7,038.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,200.20 : 12,305.70 = 4,690.20 : x
  2. Step 2: Convert to fraction form
    8,200.20/12,305.70 = 4,690.20/x
  3. Step 3: Cross multiply
    8,200.20x = 12,305.70 × 4,690.20
  4. Step 4: Simplify right side
    8,200.20x = 57,716,194.14
  5. Step 5: Solve for x
    x = 57,716,194.14/8,200.20
  6. Step 6: Final answer
    x = 7,038.39

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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.