Home / 20,806.72-28,706.24-11,847.87

Finding the Fourth Proportional to 20,806.72, 28,706.24 and 11,847.87

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Solution

The fourth proportional to 20,806.72, 28,706.24 and 11,847.87 is: 16,346.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,806.72 : 28,706.24 = 11,847.87 : x
  2. Step 2: Convert to fraction form
    20,806.72/28,706.24 = 11,847.87/x
  3. Step 3: Cross multiply
    20,806.72x = 28,706.24 × 11,847.87
  4. Step 4: Simplify right side
    20,806.72x = 340,107,829.33
  5. Step 5: Solve for x
    x = 340,107,829.33/20,806.72
  6. Step 6: Final answer
    x = 16,346.06

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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.