Home / 20,956.22-28,919.93-11,396.30

Finding the Fourth Proportional to 20,956.22, 28,919.93 and 11,396.30

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Solution

The fourth proportional to 20,956.22, 28,919.93 and 11,396.30 is: 15,727.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,956.22 : 28,919.93 = 11,396.30 : x
  2. Step 2: Convert to fraction form
    20,956.22/28,919.93 = 11,396.30/x
  3. Step 3: Cross multiply
    20,956.22x = 28,919.93 × 11,396.30
  4. Step 4: Simplify right side
    20,956.22x = 329,580,198.26
  5. Step 5: Solve for x
    x = 329,580,198.26/20,956.22
  6. Step 6: Final answer
    x = 15,727.08

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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.