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Finding the Fourth Proportional to 8,209.60, 12,301.80 and 6,119.80

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Solution

The fourth proportional to 8,209.60, 12,301.80 and 6,119.80 is: 9,170.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,209.60 : 12,301.80 = 6,119.80 : x
  2. Step 2: Convert to fraction form
    8,209.60/12,301.80 = 6,119.80/x
  3. Step 3: Cross multiply
    8,209.60x = 12,301.80 × 6,119.80
  4. Step 4: Simplify right side
    8,209.60x = 75,284,555.64
  5. Step 5: Solve for x
    x = 75,284,555.64/8,209.60
  6. Step 6: Final answer
    x = 9,170.31

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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.