Home / 13,982.68-20,975.04-3,987.28

Finding the Fourth Proportional to 13,982.68, 20,975.04 and 3,987.28

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Solution

The fourth proportional to 13,982.68, 20,975.04 and 3,987.28 is: 5,981.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,982.68 : 20,975.04 = 3,987.28 : x
  2. Step 2: Convert to fraction form
    13,982.68/20,975.04 = 3,987.28/x
  3. Step 3: Cross multiply
    13,982.68x = 20,975.04 × 3,987.28
  4. Step 4: Simplify right side
    13,982.68x = 83,633,357.49
  5. Step 5: Solve for x
    x = 83,633,357.49/13,982.68
  6. Step 6: Final answer
    x = 5,981.21

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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.