Home / 11,919.78-16,449.19-6,614.64

Finding the Fourth Proportional to 11,919.78, 16,449.19 and 6,614.64

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Solution

The fourth proportional to 11,919.78, 16,449.19 and 6,614.64 is: 9,128.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,919.78 : 16,449.19 = 6,614.64 : x
  2. Step 2: Convert to fraction form
    11,919.78/16,449.19 = 6,614.64/x
  3. Step 3: Cross multiply
    11,919.78x = 16,449.19 × 6,614.64
  4. Step 4: Simplify right side
    11,919.78x = 108,805,453.61
  5. Step 5: Solve for x
    x = 108,805,453.61/11,919.78
  6. Step 6: Final answer
    x = 9,128.14

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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.