Home / 13,850.56-20,779.36-3,989.84

Finding the Fourth Proportional to 13,850.56, 20,779.36 and 3,989.84

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Solution

The fourth proportional to 13,850.56, 20,779.36 and 3,989.84 is: 5,985.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,850.56 : 20,779.36 = 3,989.84 : x
  2. Step 2: Convert to fraction form
    13,850.56/20,779.36 = 3,989.84/x
  3. Step 3: Cross multiply
    13,850.56x = 20,779.36 × 3,989.84
  4. Step 4: Simplify right side
    13,850.56x = 82,906,321.70
  5. Step 5: Solve for x
    x = 82,906,321.70/13,850.56
  6. Step 6: Final answer
    x = 5,985.77

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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.