Home / 20,749.60-31,102.80-11,375.20

Finding the Fourth Proportional to 20,749.60, 31,102.80 and 11,375.20

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Solution

The fourth proportional to 20,749.60, 31,102.80 and 11,375.20 is: 17,050.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,749.60 : 31,102.80 = 11,375.20 : x
  2. Step 2: Convert to fraction form
    20,749.60/31,102.80 = 11,375.20/x
  3. Step 3: Cross multiply
    20,749.60x = 31,102.80 × 11,375.20
  4. Step 4: Simplify right side
    20,749.60x = 353,800,570.56
  5. Step 5: Solve for x
    x = 353,800,570.56/20,749.60
  6. Step 6: Final answer
    x = 17,050.96

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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.