Home / 20,290.35-30,439.85-11,976.56

Finding the Fourth Proportional to 20,290.35, 30,439.85 and 11,976.56

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Solution

The fourth proportional to 20,290.35, 30,439.85 and 11,976.56 is: 17,967.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,290.35 : 30,439.85 = 11,976.56 : x
  2. Step 2: Convert to fraction form
    20,290.35/30,439.85 = 11,976.56/x
  3. Step 3: Cross multiply
    20,290.35x = 30,439.85 × 11,976.56
  4. Step 4: Simplify right side
    20,290.35x = 364,564,659.35
  5. Step 5: Solve for x
    x = 364,564,659.35/20,290.35
  6. Step 6: Final answer
    x = 17,967.39

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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.