Home / 12,167.20-18,250.80-7,789.60

Finding the Fourth Proportional to 12,167.20, 18,250.80 and 7,789.60

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Solution

The fourth proportional to 12,167.20, 18,250.80 and 7,789.60 is: 11,684.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,167.20 : 18,250.80 = 7,789.60 : x
  2. Step 2: Convert to fraction form
    12,167.20/18,250.80 = 7,789.60/x
  3. Step 3: Cross multiply
    12,167.20x = 18,250.80 × 7,789.60
  4. Step 4: Simplify right side
    12,167.20x = 142,166,431.68
  5. Step 5: Solve for x
    x = 142,166,431.68/12,167.20
  6. Step 6: Final answer
    x = 11,684.40

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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.