Home / 20,410.40-28,168.24-11,911.88

Finding the Fourth Proportional to 20,410.40, 28,168.24 and 11,911.88

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Solution

The fourth proportional to 20,410.40, 28,168.24 and 11,911.88 is: 16,439.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,410.40 : 28,168.24 = 11,911.88 : x
  2. Step 2: Convert to fraction form
    20,410.40/28,168.24 = 11,911.88/x
  3. Step 3: Cross multiply
    20,410.40x = 28,168.24 × 11,911.88
  4. Step 4: Simplify right side
    20,410.40x = 335,536,694.69
  5. Step 5: Solve for x
    x = 335,536,694.69/20,410.40
  6. Step 6: Final answer
    x = 16,439.50

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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.