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Finding the Fourth Proportional to 17,670.20, 26,505.30 and 12,140.60

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Solution

The fourth proportional to 17,670.20, 26,505.30 and 12,140.60 is: 18,210.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,670.20 : 26,505.30 = 12,140.60 : x
  2. Step 2: Convert to fraction form
    17,670.20/26,505.30 = 12,140.60/x
  3. Step 3: Cross multiply
    17,670.20x = 26,505.30 × 12,140.60
  4. Step 4: Simplify right side
    17,670.20x = 321,790,245.18
  5. Step 5: Solve for x
    x = 321,790,245.18/17,670.20
  6. Step 6: Final answer
    x = 18,210.90

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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.