Home / 20,800.04-31,200.28-5,217.72

Finding the Fourth Proportional to 20,800.04, 31,200.28 and 5,217.72

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Solution

The fourth proportional to 20,800.04, 31,200.28 and 5,217.72 is: 7,826.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.04 : 31,200.28 = 5,217.72 : x
  2. Step 2: Convert to fraction form
    20,800.04/31,200.28 = 5,217.72/x
  3. Step 3: Cross multiply
    20,800.04x = 31,200.28 × 5,217.72
  4. Step 4: Simplify right side
    20,800.04x = 162,794,324.96
  5. Step 5: Solve for x
    x = 162,794,324.96/20,800.04
  6. Step 6: Final answer
    x = 7,826.64

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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.