Home / 13,919.56-20,881.26-8,078.92

Finding the Fourth Proportional to 13,919.56, 20,881.26 and 8,078.92

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Solution

The fourth proportional to 13,919.56, 20,881.26 and 8,078.92 is: 12,119.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,919.56 : 20,881.26 = 8,078.92 : x
  2. Step 2: Convert to fraction form
    13,919.56/20,881.26 = 8,078.92/x
  3. Step 3: Cross multiply
    13,919.56x = 20,881.26 × 8,078.92
  4. Step 4: Simplify right side
    13,919.56x = 168,698,029.04
  5. Step 5: Solve for x
    x = 168,698,029.04/13,919.56
  6. Step 6: Final answer
    x = 12,119.49

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1.5x scale

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.