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Finding the Fourth Proportional to 19,889.87, 27,443.88 and 11,826.36

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Solution

The fourth proportional to 19,889.87, 27,443.88 and 11,826.36 is: 16,317.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,889.87 : 27,443.88 = 11,826.36 : x
  2. Step 2: Convert to fraction form
    19,889.87/27,443.88 = 11,826.36/x
  3. Step 3: Cross multiply
    19,889.87x = 27,443.88 × 11,826.36
  4. Step 4: Simplify right side
    19,889.87x = 324,561,204.68
  5. Step 5: Solve for x
    x = 324,561,204.68/19,889.87
  6. Step 6: Final answer
    x = 16,317.92

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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.