Home / 20,777.85-28,650.24-13,214.61

Finding the Fourth Proportional to 20,777.85, 28,650.24 and 13,214.61

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Solution

The fourth proportional to 20,777.85, 28,650.24 and 13,214.61 is: 18,221.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,777.85 : 28,650.24 = 13,214.61 : x
  2. Step 2: Convert to fraction form
    20,777.85/28,650.24 = 13,214.61/x
  3. Step 3: Cross multiply
    20,777.85x = 28,650.24 × 13,214.61
  4. Step 4: Simplify right side
    20,777.85x = 378,601,748.01
  5. Step 5: Solve for x
    x = 378,601,748.01/20,777.85
  6. Step 6: Final answer
    x = 18,221.41

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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.