Home / 13,856.56-20,784.85-3,860.91

Finding the Fourth Proportional to 13,856.56, 20,784.85 and 3,860.91

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Solution

The fourth proportional to 13,856.56, 20,784.85 and 3,860.91 is: 5,791.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,856.56 : 20,784.85 = 3,860.91 : x
  2. Step 2: Convert to fraction form
    13,856.56/20,784.85 = 3,860.91/x
  3. Step 3: Cross multiply
    13,856.56x = 20,784.85 × 3,860.91
  4. Step 4: Simplify right side
    13,856.56x = 80,248,321.64
  5. Step 5: Solve for x
    x = 80,248,321.64/13,856.56
  6. Step 6: Final answer
    x = 5,791.36

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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.