Home / 20,942.72-28,900.20-11,983.88

Finding the Fourth Proportional to 20,942.72, 28,900.20 and 11,983.88

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Solution

The fourth proportional to 20,942.72, 28,900.20 and 11,983.88 is: 16,537.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.72 : 28,900.20 = 11,983.88 : x
  2. Step 2: Convert to fraction form
    20,942.72/28,900.20 = 11,983.88/x
  3. Step 3: Cross multiply
    20,942.72x = 28,900.20 × 11,983.88
  4. Step 4: Simplify right side
    20,942.72x = 346,336,384.28
  5. Step 5: Solve for x
    x = 346,336,384.28/20,942.72
  6. Step 6: Final answer
    x = 16,537.32

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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.