Home / 20,620.26-28,455.71-11,188.76

Finding the Fourth Proportional to 20,620.26, 28,455.71 and 11,188.76

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Solution

The fourth proportional to 20,620.26, 28,455.71 and 11,188.76 is: 15,440.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,620.26 : 28,455.71 = 11,188.76 : x
  2. Step 2: Convert to fraction form
    20,620.26/28,455.71 = 11,188.76/x
  3. Step 3: Cross multiply
    20,620.26x = 28,455.71 × 11,188.76
  4. Step 4: Simplify right side
    20,620.26x = 318,383,911.60
  5. Step 5: Solve for x
    x = 318,383,911.60/20,620.26
  6. Step 6: Final answer
    x = 15,440.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.