Home / 20,917.58-28,863.14-11,963.04

Finding the Fourth Proportional to 20,917.58, 28,863.14 and 11,963.04

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Solution

The fourth proportional to 20,917.58, 28,863.14 and 11,963.04 is: 16,507.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.58 : 28,863.14 = 11,963.04 : x
  2. Step 2: Convert to fraction form
    20,917.58/28,863.14 = 11,963.04/x
  3. Step 3: Cross multiply
    20,917.58x = 28,863.14 × 11,963.04
  4. Step 4: Simplify right side
    20,917.58x = 345,290,898.35
  5. Step 5: Solve for x
    x = 345,290,898.35/20,917.58
  6. Step 6: Final answer
    x = 16,507.21

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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.