Home / 10,892.20-16,338.30-7,940.20

Finding the Fourth Proportional to 10,892.20, 16,338.30 and 7,940.20

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Solution

The fourth proportional to 10,892.20, 16,338.30 and 7,940.20 is: 11,910.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,892.20 : 16,338.30 = 7,940.20 : x
  2. Step 2: Convert to fraction form
    10,892.20/16,338.30 = 7,940.20/x
  3. Step 3: Cross multiply
    10,892.20x = 16,338.30 × 7,940.20
  4. Step 4: Simplify right side
    10,892.20x = 129,729,369.66
  5. Step 5: Solve for x
    x = 129,729,369.66/10,892.20
  6. Step 6: Final answer
    x = 11,910.30

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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.