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Finding the Fourth Proportional to 11,239.81, 16,859.72 and 2,919.13

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Solution

The fourth proportional to 11,239.81, 16,859.72 and 2,919.13 is: 4,378.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,239.81 : 16,859.72 = 2,919.13 : x
  2. Step 2: Convert to fraction form
    11,239.81/16,859.72 = 2,919.13/x
  3. Step 3: Cross multiply
    11,239.81x = 16,859.72 × 2,919.13
  4. Step 4: Simplify right side
    11,239.81x = 49,215,679.59
  5. Step 5: Solve for x
    x = 49,215,679.59/11,239.81
  6. Step 6: Final answer
    x = 4,378.69

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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.