Home / 20,623.97-28,439.57-12,238.85

Finding the Fourth Proportional to 20,623.97, 28,439.57 and 12,238.85

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Solution

The fourth proportional to 20,623.97, 28,439.57 and 12,238.85 is: 16,876.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,623.97 : 28,439.57 = 12,238.85 : x
  2. Step 2: Convert to fraction form
    20,623.97/28,439.57 = 12,238.85/x
  3. Step 3: Cross multiply
    20,623.97x = 28,439.57 × 12,238.85
  4. Step 4: Simplify right side
    20,623.97x = 348,067,570.10
  5. Step 5: Solve for x
    x = 348,067,570.10/20,623.97
  6. Step 6: Final answer
    x = 16,876.85

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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.