Home / 20,768.20-31,152.20-5,185.82

Finding the Fourth Proportional to 20,768.20, 31,152.20 and 5,185.82

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Solution

The fourth proportional to 20,768.20, 31,152.20 and 5,185.82 is: 7,778.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.20 : 31,152.20 = 5,185.82 : x
  2. Step 2: Convert to fraction form
    20,768.20/31,152.20 = 5,185.82/x
  3. Step 3: Cross multiply
    20,768.20x = 31,152.20 × 5,185.82
  4. Step 4: Simplify right side
    20,768.20x = 161,549,753.76
  5. Step 5: Solve for x
    x = 161,549,753.76/20,768.20
  6. Step 6: Final answer
    x = 7,778.71

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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.