Home / 13,779.75-20,669.22-4,419.39

Finding the Fourth Proportional to 13,779.75, 20,669.22 and 4,419.39

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Solution

The fourth proportional to 13,779.75, 20,669.22 and 4,419.39 is: 6,628.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.75 : 20,669.22 = 4,419.39 : x
  2. Step 2: Convert to fraction form
    13,779.75/20,669.22 = 4,419.39/x
  3. Step 3: Cross multiply
    13,779.75x = 20,669.22 × 4,419.39
  4. Step 4: Simplify right side
    13,779.75x = 91,345,344.18
  5. Step 5: Solve for x
    x = 91,345,344.18/13,779.75
  6. Step 6: Final answer
    x = 6,628.96

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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.