Home / 17,729.70-26,558.10-12,189.30

Finding the Fourth Proportional to 17,729.70, 26,558.10 and 12,189.30

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Solution

The fourth proportional to 17,729.70, 26,558.10 and 12,189.30 is: 18,258.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,729.70 : 26,558.10 = 12,189.30 : x
  2. Step 2: Convert to fraction form
    17,729.70/26,558.10 = 12,189.30/x
  3. Step 3: Cross multiply
    17,729.70x = 26,558.10 × 12,189.30
  4. Step 4: Simplify right side
    17,729.70x = 323,724,648.33
  5. Step 5: Solve for x
    x = 323,724,648.33/17,729.70
  6. Step 6: Final answer
    x = 18,258.89

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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.