Home / 18,930.20-28,406.10-7,251.80

Finding the Fourth Proportional to 18,930.20, 28,406.10 and 7,251.80

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Solution

The fourth proportional to 18,930.20, 28,406.10 and 7,251.80 is: 10,881.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,930.20 : 28,406.10 = 7,251.80 : x
  2. Step 2: Convert to fraction form
    18,930.20/28,406.10 = 7,251.80/x
  3. Step 3: Cross multiply
    18,930.20x = 28,406.10 × 7,251.80
  4. Step 4: Simplify right side
    18,930.20x = 205,995,355.98
  5. Step 5: Solve for x
    x = 205,995,355.98/18,930.20
  6. Step 6: Final answer
    x = 10,881.84

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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.