Home / 20,289.36-30,439.86-11,976.96

Finding the Fourth Proportional to 20,289.36, 30,439.86 and 11,976.96

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Solution

The fourth proportional to 20,289.36, 30,439.86 and 11,976.96 is: 17,968.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,289.36 : 30,439.86 = 11,976.96 : x
  2. Step 2: Convert to fraction form
    20,289.36/30,439.86 = 11,976.96/x
  3. Step 3: Cross multiply
    20,289.36x = 30,439.86 × 11,976.96
  4. Step 4: Simplify right side
    20,289.36x = 364,576,985.63
  5. Step 5: Solve for x
    x = 364,576,985.63/20,289.36
  6. Step 6: Final answer
    x = 17,968.88

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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.