Home / 18,815.10-25,964.46-10,857.12

Finding the Fourth Proportional to 18,815.10, 25,964.46 and 10,857.12

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Solution

The fourth proportional to 18,815.10, 25,964.46 and 10,857.12 is: 14,982.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,815.10 : 25,964.46 = 10,857.12 : x
  2. Step 2: Convert to fraction form
    18,815.10/25,964.46 = 10,857.12/x
  3. Step 3: Cross multiply
    18,815.10x = 25,964.46 × 10,857.12
  4. Step 4: Simplify right side
    18,815.10x = 281,899,257.96
  5. Step 5: Solve for x
    x = 281,899,257.96/18,815.10
  6. Step 6: Final answer
    x = 14,982.61

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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.