Home / 7,982.72-11,974.08-2,139.36

Finding the Fourth Proportional to 7,982.72, 11,974.08 and 2,139.36

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Solution

The fourth proportional to 7,982.72, 11,974.08 and 2,139.36 is: 3,209.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,982.72 : 11,974.08 = 2,139.36 : x
  2. Step 2: Convert to fraction form
    7,982.72/11,974.08 = 2,139.36/x
  3. Step 3: Cross multiply
    7,982.72x = 11,974.08 × 2,139.36
  4. Step 4: Simplify right side
    7,982.72x = 25,616,867.79
  5. Step 5: Solve for x
    x = 25,616,867.79/7,982.72
  6. Step 6: Final answer
    x = 3,209.04

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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.