Home / 20,961.67-28,914.45-12,896.69

Finding the Fourth Proportional to 20,961.67, 28,914.45 and 12,896.69

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Solution

The fourth proportional to 20,961.67, 28,914.45 and 12,896.69 is: 17,789.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.67 : 28,914.45 = 12,896.69 : x
  2. Step 2: Convert to fraction form
    20,961.67/28,914.45 = 12,896.69/x
  3. Step 3: Cross multiply
    20,961.67x = 28,914.45 × 12,896.69
  4. Step 4: Simplify right side
    20,961.67x = 372,900,698.17
  5. Step 5: Solve for x
    x = 372,900,698.17/20,961.67
  6. Step 6: Final answer
    x = 17,789.65

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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.