Home / 20,840.68-28,759.09-11,887.85

Finding the Fourth Proportional to 20,840.68, 28,759.09 and 11,887.85

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Solution

The fourth proportional to 20,840.68, 28,759.09 and 11,887.85 is: 16,404.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,840.68 : 28,759.09 = 11,887.85 : x
  2. Step 2: Convert to fraction form
    20,840.68/28,759.09 = 11,887.85/x
  3. Step 3: Cross multiply
    20,840.68x = 28,759.09 × 11,887.85
  4. Step 4: Simplify right side
    20,840.68x = 341,883,748.06
  5. Step 5: Solve for x
    x = 341,883,748.06/20,840.68
  6. Step 6: Final answer
    x = 16,404.63

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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.