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Finding the Fourth Proportional to 15,855.60, 21,873.60 and 11,876.88

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Solution

The fourth proportional to 15,855.60, 21,873.60 and 11,876.88 is: 16,384.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,855.60 : 21,873.60 = 11,876.88 : x
  2. Step 2: Convert to fraction form
    15,855.60/21,873.60 = 11,876.88/x
  3. Step 3: Cross multiply
    15,855.60x = 21,873.60 × 11,876.88
  4. Step 4: Simplify right side
    15,855.60x = 259,790,122.37
  5. Step 5: Solve for x
    x = 259,790,122.37/15,855.60
  6. Step 6: Final answer
    x = 16,384.76

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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.