Home / 20,722.20-31,107.60-20,576.40

Finding the Fourth Proportional to 20,722.20, 31,107.60 and 20,576.40

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Solution

The fourth proportional to 20,722.20, 31,107.60 and 20,576.40 is: 30,888.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,722.20 : 31,107.60 = 20,576.40 : x
  2. Step 2: Convert to fraction form
    20,722.20/31,107.60 = 20,576.40/x
  3. Step 3: Cross multiply
    20,722.20x = 31,107.60 × 20,576.40
  4. Step 4: Simplify right side
    20,722.20x = 640,082,420.64
  5. Step 5: Solve for x
    x = 640,082,420.64/20,722.20
  6. Step 6: Final answer
    x = 30,888.73

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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.