Home / 20,576.20-30,821.10-11,331.40

Finding the Fourth Proportional to 20,576.20, 30,821.10 and 11,331.40

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Solution

The fourth proportional to 20,576.20, 30,821.10 and 11,331.40 is: 16,973.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,576.20 : 30,821.10 = 11,331.40 : x
  2. Step 2: Convert to fraction form
    20,576.20/30,821.10 = 11,331.40/x
  3. Step 3: Cross multiply
    20,576.20x = 30,821.10 × 11,331.40
  4. Step 4: Simplify right side
    20,576.20x = 349,246,212.54
  5. Step 5: Solve for x
    x = 349,246,212.54/20,576.20
  6. Step 6: Final answer
    x = 16,973.31

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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.