Home / 10,920.20-16,380.30-7,226.60

Finding the Fourth Proportional to 10,920.20, 16,380.30 and 7,226.60

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Solution

The fourth proportional to 10,920.20, 16,380.30 and 7,226.60 is: 10,839.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,920.20 : 16,380.30 = 7,226.60 : x
  2. Step 2: Convert to fraction form
    10,920.20/16,380.30 = 7,226.60/x
  3. Step 3: Cross multiply
    10,920.20x = 16,380.30 × 7,226.60
  4. Step 4: Simplify right side
    10,920.20x = 118,373,875.98
  5. Step 5: Solve for x
    x = 118,373,875.98/10,920.20
  6. Step 6: Final answer
    x = 10,839.90

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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.