Home / 12,112.60-18,147.30-7,490.20

Finding the Fourth Proportional to 12,112.60, 18,147.30 and 7,490.20

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Solution

The fourth proportional to 12,112.60, 18,147.30 and 7,490.20 is: 11,221.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,112.60 : 18,147.30 = 7,490.20 : x
  2. Step 2: Convert to fraction form
    12,112.60/18,147.30 = 7,490.20/x
  3. Step 3: Cross multiply
    12,112.60x = 18,147.30 × 7,490.20
  4. Step 4: Simplify right side
    12,112.60x = 135,926,906.46
  5. Step 5: Solve for x
    x = 135,926,906.46/12,112.60
  6. Step 6: Final answer
    x = 11,221.94

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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.