Home / 20,960.28-28,924.89-11,399.96

Finding the Fourth Proportional to 20,960.28, 28,924.89 and 11,399.96

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Solution

The fourth proportional to 20,960.28, 28,924.89 and 11,399.96 is: 15,731.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,960.28 : 28,924.89 = 11,399.96 : x
  2. Step 2: Convert to fraction form
    20,960.28/28,924.89 = 11,399.96/x
  3. Step 3: Cross multiply
    20,960.28x = 28,924.89 × 11,399.96
  4. Step 4: Simplify right side
    20,960.28x = 329,742,519.99
  5. Step 5: Solve for x
    x = 329,742,519.99/20,960.28
  6. Step 6: Final answer
    x = 15,731.78

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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.