Home / 20,847.56-28,763.96-11,891.80

Finding the Fourth Proportional to 20,847.56, 28,763.96 and 11,891.80

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Solution

The fourth proportional to 20,847.56, 28,763.96 and 11,891.80 is: 16,407.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,847.56 : 28,763.96 = 11,891.80 : x
  2. Step 2: Convert to fraction form
    20,847.56/28,763.96 = 11,891.80/x
  3. Step 3: Cross multiply
    20,847.56x = 28,763.96 × 11,891.80
  4. Step 4: Simplify right side
    20,847.56x = 342,055,128.16
  5. Step 5: Solve for x
    x = 342,055,128.16/20,847.56
  6. Step 6: Final answer
    x = 16,407.44

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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.