Home / 13,764.28-18,996.30-12,919.81

Finding the Fourth Proportional to 13,764.28, 18,996.30 and 12,919.81

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Solution

The fourth proportional to 13,764.28, 18,996.30 and 12,919.81 is: 17,830.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,764.28 : 18,996.30 = 12,919.81 : x
  2. Step 2: Convert to fraction form
    13,764.28/18,996.30 = 12,919.81/x
  3. Step 3: Cross multiply
    13,764.28x = 18,996.30 × 12,919.81
  4. Step 4: Simplify right side
    13,764.28x = 245,428,586.70
  5. Step 5: Solve for x
    x = 245,428,586.70/13,764.28
  6. Step 6: Final answer
    x = 17,830.83

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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.