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Finding the Fourth Proportional to 18,811.12, 25,958.42 and 10,855.88

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Solution

The fourth proportional to 18,811.12, 25,958.42 and 10,855.88 is: 14,980.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,811.12 : 25,958.42 = 10,855.88 : x
  2. Step 2: Convert to fraction form
    18,811.12/25,958.42 = 10,855.88/x
  3. Step 3: Cross multiply
    18,811.12x = 25,958.42 × 10,855.88
  4. Step 4: Simplify right side
    18,811.12x = 281,801,492.51
  5. Step 5: Solve for x
    x = 281,801,492.51/18,811.12
  6. Step 6: Final answer
    x = 14,980.58

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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.