Home / 20,956.81-28,919.97-11,396.88

Finding the Fourth Proportional to 20,956.81, 28,919.97 and 11,396.88

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Solution

The fourth proportional to 20,956.81, 28,919.97 and 11,396.88 is: 15,727.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,956.81 : 28,919.97 = 11,396.88 : x
  2. Step 2: Convert to fraction form
    20,956.81/28,919.97 = 11,396.88/x
  3. Step 3: Cross multiply
    20,956.81x = 28,919.97 × 11,396.88
  4. Step 4: Simplify right side
    20,956.81x = 329,597,427.69
  5. Step 5: Solve for x
    x = 329,597,427.69/20,956.81
  6. Step 6: Final answer
    x = 15,727.46

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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.