Home / 11,931.45-16,464.56-6,891.72

Finding the Fourth Proportional to 11,931.45, 16,464.56 and 6,891.72

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Solution

The fourth proportional to 11,931.45, 16,464.56 and 6,891.72 is: 9,510.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,931.45 : 16,464.56 = 6,891.72 : x
  2. Step 2: Convert to fraction form
    11,931.45/16,464.56 = 6,891.72/x
  3. Step 3: Cross multiply
    11,931.45x = 16,464.56 × 6,891.72
  4. Step 4: Simplify right side
    11,931.45x = 113,469,137.44
  5. Step 5: Solve for x
    x = 113,469,137.44/11,931.45
  6. Step 6: Final answer
    x = 9,510.09

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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.