Home / 20,079.40-27,709.86-11,126.92

Finding the Fourth Proportional to 20,079.40, 27,709.86 and 11,126.92

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Solution

The fourth proportional to 20,079.40, 27,709.86 and 11,126.92 is: 15,355.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,079.40 : 27,709.86 = 11,126.92 : x
  2. Step 2: Convert to fraction form
    20,079.40/27,709.86 = 11,126.92/x
  3. Step 3: Cross multiply
    20,079.40x = 27,709.86 × 11,126.92
  4. Step 4: Simplify right side
    20,079.40x = 308,325,395.43
  5. Step 5: Solve for x
    x = 308,325,395.43/20,079.40
  6. Step 6: Final answer
    x = 15,355.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.