Home / 20,968.08-31,452.12-5,385.72

Finding the Fourth Proportional to 20,968.08, 31,452.12 and 5,385.72

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Solution

The fourth proportional to 20,968.08, 31,452.12 and 5,385.72 is: 8,078.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968.08 : 31,452.12 = 5,385.72 : x
  2. Step 2: Convert to fraction form
    20,968.08/31,452.12 = 5,385.72/x
  3. Step 3: Cross multiply
    20,968.08x = 31,452.12 × 5,385.72
  4. Step 4: Simplify right side
    20,968.08x = 169,392,311.73
  5. Step 5: Solve for x
    x = 169,392,311.73/20,968.08
  6. Step 6: Final answer
    x = 8,078.58

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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.