Home / 20,832.50-28,749.12-11,400.86

Finding the Fourth Proportional to 20,832.50, 28,749.12 and 11,400.86

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Solution

The fourth proportional to 20,832.50, 28,749.12 and 11,400.86 is: 15,733.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,832.50 : 28,749.12 = 11,400.86 : x
  2. Step 2: Convert to fraction form
    20,832.50/28,749.12 = 11,400.86/x
  3. Step 3: Cross multiply
    20,832.50x = 28,749.12 × 11,400.86
  4. Step 4: Simplify right side
    20,832.50x = 327,764,692.24
  5. Step 5: Solve for x
    x = 327,764,692.24/20,832.50
  6. Step 6: Final answer
    x = 15,733.33

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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.