Home / 11,910.28-16,436.64-8,920.84

Finding the Fourth Proportional to 11,910.28, 16,436.64 and 8,920.84

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Solution

The fourth proportional to 11,910.28, 16,436.64 and 8,920.84 is: 12,311.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,910.28 : 16,436.64 = 8,920.84 : x
  2. Step 2: Convert to fraction form
    11,910.28/16,436.64 = 8,920.84/x
  3. Step 3: Cross multiply
    11,910.28x = 16,436.64 × 8,920.84
  4. Step 4: Simplify right side
    11,910.28x = 146,628,635.58
  5. Step 5: Solve for x
    x = 146,628,635.58/11,910.28
  6. Step 6: Final answer
    x = 12,311.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.