Home / 13,782.56-20,667.69-3,919.55

Finding the Fourth Proportional to 13,782.56, 20,667.69 and 3,919.55

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Solution

The fourth proportional to 13,782.56, 20,667.69 and 3,919.55 is: 5,877.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,782.56 : 20,667.69 = 3,919.55 : x
  2. Step 2: Convert to fraction form
    13,782.56/20,667.69 = 3,919.55/x
  3. Step 3: Cross multiply
    13,782.56x = 20,667.69 × 3,919.55
  4. Step 4: Simplify right side
    13,782.56x = 81,007,941.00
  5. Step 5: Solve for x
    x = 81,007,941.00/13,782.56
  6. Step 6: Final answer
    x = 5,877.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.