Home / 13,997.80-20,972.38-11,686.12

Finding the Fourth Proportional to 13,997.80, 20,972.38 and 11,686.12

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Solution

The fourth proportional to 13,997.80, 20,972.38 and 11,686.12 is: 17,508.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,997.80 : 20,972.38 = 11,686.12 : x
  2. Step 2: Convert to fraction form
    13,997.80/20,972.38 = 11,686.12/x
  3. Step 3: Cross multiply
    13,997.80x = 20,972.38 × 11,686.12
  4. Step 4: Simplify right side
    13,997.80x = 245,085,749.37
  5. Step 5: Solve for x
    x = 245,085,749.37/13,997.80
  6. Step 6: Final answer
    x = 17,508.88

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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.