Home / 13,976.91-20,966.81-5,209.83

Finding the Fourth Proportional to 13,976.91, 20,966.81 and 5,209.83

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Solution

The fourth proportional to 13,976.91, 20,966.81 and 5,209.83 is: 7,815.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,976.91 : 20,966.81 = 5,209.83 : x
  2. Step 2: Convert to fraction form
    13,976.91/20,966.81 = 5,209.83/x
  3. Step 3: Cross multiply
    13,976.91x = 20,966.81 × 5,209.83
  4. Step 4: Simplify right side
    13,976.91x = 109,233,489.69
  5. Step 5: Solve for x
    x = 109,233,489.69/13,976.91
  6. Step 6: Final answer
    x = 7,815.28

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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.