Home / 20,905.76-28,850.72-11,474.24

Finding the Fourth Proportional to 20,905.76, 28,850.72 and 11,474.24

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Solution

The fourth proportional to 20,905.76, 28,850.72 and 11,474.24 is: 15,834.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,905.76 : 28,850.72 = 11,474.24 : x
  2. Step 2: Convert to fraction form
    20,905.76/28,850.72 = 11,474.24/x
  3. Step 3: Cross multiply
    20,905.76x = 28,850.72 × 11,474.24
  4. Step 4: Simplify right side
    20,905.76x = 331,040,085.45
  5. Step 5: Solve for x
    x = 331,040,085.45/20,905.76
  6. Step 6: Final answer
    x = 15,834.87

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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.