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Finding the Fourth Proportional to 18,787.80, 25,922.92 and 11,232.88

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Solution

The fourth proportional to 18,787.80, 25,922.92 and 11,232.88 is: 15,498.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,787.80 : 25,922.92 = 11,232.88 : x
  2. Step 2: Convert to fraction form
    18,787.80/25,922.92 = 11,232.88/x
  3. Step 3: Cross multiply
    18,787.80x = 25,922.92 × 11,232.88
  4. Step 4: Simplify right side
    18,787.80x = 291,189,049.61
  5. Step 5: Solve for x
    x = 291,189,049.61/18,787.80
  6. Step 6: Final answer
    x = 15,498.84

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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.