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Finding the Fourth Proportional to 18,026.40, 27,025.20 and 7,629.60

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Solution

The fourth proportional to 18,026.40, 27,025.20 and 7,629.60 is: 11,438.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,026.40 : 27,025.20 = 7,629.60 : x
  2. Step 2: Convert to fraction form
    18,026.40/27,025.20 = 7,629.60/x
  3. Step 3: Cross multiply
    18,026.40x = 27,025.20 × 7,629.60
  4. Step 4: Simplify right side
    18,026.40x = 206,191,465.92
  5. Step 5: Solve for x
    x = 206,191,465.92/18,026.40
  6. Step 6: Final answer
    x = 11,438.31

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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.