Home / 8,197.20-12,305.40-5,287.60

Finding the Fourth Proportional to 8,197.20, 12,305.40 and 5,287.60

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Solution

The fourth proportional to 8,197.20, 12,305.40 and 5,287.60 is: 7,937.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,197.20 : 12,305.40 = 5,287.60 : x
  2. Step 2: Convert to fraction form
    8,197.20/12,305.40 = 5,287.60/x
  3. Step 3: Cross multiply
    8,197.20x = 12,305.40 × 5,287.60
  4. Step 4: Simplify right side
    8,197.20x = 65,066,033.04
  5. Step 5: Solve for x
    x = 65,066,033.04/8,197.20
  6. Step 6: Final answer
    x = 7,937.59

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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.