Home / 20,518.92-30,780.20-5,728.73

Finding the Fourth Proportional to 20,518.92, 30,780.20 and 5,728.73

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Solution

The fourth proportional to 20,518.92, 30,780.20 and 5,728.73 is: 8,593.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.92 : 30,780.20 = 5,728.73 : x
  2. Step 2: Convert to fraction form
    20,518.92/30,780.20 = 5,728.73/x
  3. Step 3: Cross multiply
    20,518.92x = 30,780.20 × 5,728.73
  4. Step 4: Simplify right side
    20,518.92x = 176,331,315.57
  5. Step 5: Solve for x
    x = 176,331,315.57/20,518.92
  6. Step 6: Final answer
    x = 8,593.60

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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.