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Finding the Fourth Proportional to 12,139.44, 16,743.44 and 8,363.84

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Solution

The fourth proportional to 12,139.44, 16,743.44 and 8,363.84 is: 11,535.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.44 : 16,743.44 = 8,363.84 : x
  2. Step 2: Convert to fraction form
    12,139.44/16,743.44 = 8,363.84/x
  3. Step 3: Cross multiply
    12,139.44x = 16,743.44 × 8,363.84
  4. Step 4: Simplify right side
    12,139.44x = 140,039,453.21
  5. Step 5: Solve for x
    x = 140,039,453.21/12,139.44
  6. Step 6: Final answer
    x = 11,535.91

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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.