Home / 13,739.88-20,610.90-5,419.32

Finding the Fourth Proportional to 13,739.88, 20,610.90 and 5,419.32

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Solution

The fourth proportional to 13,739.88, 20,610.90 and 5,419.32 is: 8,129.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,739.88 : 20,610.90 = 5,419.32 : x
  2. Step 2: Convert to fraction form
    13,739.88/20,610.90 = 5,419.32/x
  3. Step 3: Cross multiply
    13,739.88x = 20,610.90 × 5,419.32
  4. Step 4: Simplify right side
    13,739.88x = 111,697,062.59
  5. Step 5: Solve for x
    x = 111,697,062.59/13,739.88
  6. Step 6: Final answer
    x = 8,129.41

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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.