Home / 18,815.11-25,965.66-10,857.31

Finding the Fourth Proportional to 18,815.11, 25,965.66 and 10,857.31

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Solution

The fourth proportional to 18,815.11, 25,965.66 and 10,857.31 is: 14,983.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,815.11 : 25,965.66 = 10,857.31 : x
  2. Step 2: Convert to fraction form
    18,815.11/25,965.66 = 10,857.31/x
  3. Step 3: Cross multiply
    18,815.11x = 25,965.66 × 10,857.31
  4. Step 4: Simplify right side
    18,815.11x = 281,917,219.97
  5. Step 5: Solve for x
    x = 281,917,219.97/18,815.11
  6. Step 6: Final answer
    x = 14,983.55

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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.