Home / 20,800.24-31,212.64-10,940.28

Finding the Fourth Proportional to 20,800.24, 31,212.64 and 10,940.28

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Solution

The fourth proportional to 20,800.24, 31,212.64 and 10,940.28 is: 16,416.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.24 : 31,212.64 = 10,940.28 : x
  2. Step 2: Convert to fraction form
    20,800.24/31,212.64 = 10,940.28/x
  3. Step 3: Cross multiply
    20,800.24x = 31,212.64 × 10,940.28
  4. Step 4: Simplify right side
    20,800.24x = 341,475,021.14
  5. Step 5: Solve for x
    x = 341,475,021.14/20,800.24
  6. Step 6: Final answer
    x = 16,416.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.