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Finding the Fourth Proportional to 18,059.30, 27,078.15 and 9,311.30

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Solution

The fourth proportional to 18,059.30, 27,078.15 and 9,311.30 is: 13,961.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,059.30 : 27,078.15 = 9,311.30 : x
  2. Step 2: Convert to fraction form
    18,059.30/27,078.15 = 9,311.30/x
  3. Step 3: Cross multiply
    18,059.30x = 27,078.15 × 9,311.30
  4. Step 4: Simplify right side
    18,059.30x = 252,132,778.10
  5. Step 5: Solve for x
    x = 252,132,778.10/18,059.30
  6. Step 6: Final answer
    x = 13,961.38

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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.