Home / 13,979.65-20,982.66-5,103.58

Finding the Fourth Proportional to 13,979.65, 20,982.66 and 5,103.58

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Solution

The fourth proportional to 13,979.65, 20,982.66 and 5,103.58 is: 7,660.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.65 : 20,982.66 = 5,103.58 : x
  2. Step 2: Convert to fraction form
    13,979.65/20,982.66 = 5,103.58/x
  3. Step 3: Cross multiply
    13,979.65x = 20,982.66 × 5,103.58
  4. Step 4: Simplify right side
    13,979.65x = 107,086,683.92
  5. Step 5: Solve for x
    x = 107,086,683.92/13,979.65
  6. Step 6: Final answer
    x = 7,660.18

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1.5x scale

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.