Home / 20,908.36-28,844.42-12,839.24

Finding the Fourth Proportional to 20,908.36, 28,844.42 and 12,839.24

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Solution

The fourth proportional to 20,908.36, 28,844.42 and 12,839.24 is: 17,712.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,908.36 : 28,844.42 = 12,839.24 : x
  2. Step 2: Convert to fraction form
    20,908.36/28,844.42 = 12,839.24/x
  3. Step 3: Cross multiply
    20,908.36x = 28,844.42 × 12,839.24
  4. Step 4: Simplify right side
    20,908.36x = 370,340,431.04
  5. Step 5: Solve for x
    x = 370,340,431.04/20,908.36
  6. Step 6: Final answer
    x = 17,712.55

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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.