Home / 13,320.72-19,984.20-3,960.80

Finding the Fourth Proportional to 13,320.72, 19,984.20 and 3,960.80

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Solution

The fourth proportional to 13,320.72, 19,984.20 and 3,960.80 is: 5,942.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,320.72 : 19,984.20 = 3,960.80 : x
  2. Step 2: Convert to fraction form
    13,320.72/19,984.20 = 3,960.80/x
  3. Step 3: Cross multiply
    13,320.72x = 19,984.20 × 3,960.80
  4. Step 4: Simplify right side
    13,320.72x = 79,153,419.36
  5. Step 5: Solve for x
    x = 79,153,419.36/13,320.72
  6. Step 6: Final answer
    x = 5,942.13

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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.