Home / 13,440.40-20,160.60-3,581.20

Finding the Fourth Proportional to 13,440.40, 20,160.60 and 3,581.20

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Solution

The fourth proportional to 13,440.40, 20,160.60 and 3,581.20 is: 5,371.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,440.40 : 20,160.60 = 3,581.20 : x
  2. Step 2: Convert to fraction form
    13,440.40/20,160.60 = 3,581.20/x
  3. Step 3: Cross multiply
    13,440.40x = 20,160.60 × 3,581.20
  4. Step 4: Simplify right side
    13,440.40x = 72,199,140.72
  5. Step 5: Solve for x
    x = 72,199,140.72/13,440.40
  6. Step 6: Final answer
    x = 5,371.80

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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.