Home / 13,619.48-20,428.80-3,759.36

Finding the Fourth Proportional to 13,619.48, 20,428.80 and 3,759.36

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Solution

The fourth proportional to 13,619.48, 20,428.80 and 3,759.36 is: 5,638.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,619.48 : 20,428.80 = 3,759.36 : x
  2. Step 2: Convert to fraction form
    13,619.48/20,428.80 = 3,759.36/x
  3. Step 3: Cross multiply
    13,619.48x = 20,428.80 × 3,759.36
  4. Step 4: Simplify right side
    13,619.48x = 76,799,213.57
  5. Step 5: Solve for x
    x = 76,799,213.57/13,619.48
  6. Step 6: Final answer
    x = 5,638.92

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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.