Home / 20,917.56-28,868.52-11,965.88

Finding the Fourth Proportional to 20,917.56, 28,868.52 and 11,965.88

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Solution

The fourth proportional to 20,917.56, 28,868.52 and 11,965.88 is: 16,514.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.56 : 28,868.52 = 11,965.88 : x
  2. Step 2: Convert to fraction form
    20,917.56/28,868.52 = 11,965.88/x
  3. Step 3: Cross multiply
    20,917.56x = 28,868.52 × 11,965.88
  4. Step 4: Simplify right side
    20,917.56x = 345,437,246.10
  5. Step 5: Solve for x
    x = 345,437,246.10/20,917.56
  6. Step 6: Final answer
    x = 16,514.22

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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.